I’ll try to offer updates as I make them, but here’s the vital stats:
Onex kit #245. Standard kit with pre-assembled spars and machined angle kit. Kit delivered 3/18/25. Planning on using a Rotax 912 ULS for power. Also currently planning to build as a taildragger but will build tri gear components into the build in case I want to convert the gear in the future.
To date I have around 110 hours into the build:
- vertical stab done minus tip
- horizontal stab done minus tips
- fuselage in canoe stage, aft fuselage done minus lower skin
- aileron mixer ribs nearly done
- finishing flaps currently
AirVenture this year will hopefully be a shopping run for EFIS and avionics, exterior lights, and a bunch of other stuff.
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Looks great so far! Have you done this before? 
From what little I can see that’s fine old F-250 in the garage too!
Dale
I had forgotten how much fun the building process is, Dale! Plus these new kits are a whole generation better with everything being formed and pilot holes drilled. It’s amazing!
The F250 is my late father in laws. He bought it when it was one year old and it’s been in the family ever since. 78K miles and all original!
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I’ve considered building again. Getting to the age where I’ll need a high wing so I can get in & out of the thing. 
I’m guessing the F-250 isn’t for sale either …
Mike, thanks for sharing. Your perspective as both an “old kit” and “new kit” builder are really interesting. That’s really cool that you’re getting experience across multiple kit generations.
Michael, what EFIS and Lights are you leaning toward?
Good question. My plan is to look at all those at AirVenture this summer, but at the moment I’m leaning towards either Grand Rapids Horizon EX or MGL MX2 (new, not out yet but soon). I used an MGL Xtreme in my Waiex and was happy with it but I really would like to have a PFD, engine gauges, and a map all in one screen.
As for lights, I used Aveo LED’s on the Waiex and loved them so may do the same, and probably AeroLED’s for landing lights. Either the Sunray EVO III or the Microsun, depending on which I like more when I see them.
So many decisions!!
Just a quick update on Onex #245, as I hit around 250 hours of build time, the fuselage is on the gear and fuselage controls are being installed. The elevator torque tubes are installed and I’m working on rudder cables. The seat is fabricated, engine mount on (tri gear weldment is included for a faster gear swap in the future), flap handle and brake handle done.
I was able to find a used Rotax 912 ULS that’s currently in for IRAN inspection, avionics mostly purchased, and prop&exhaust on order.
Making progress!
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I’m looking forward to seeing your instrument panel!! I built mine on the cheap but hope to upgrade someday.
Wes
I was just about to ask and you read my mind! I think that is a great choice for your Onex. Cool find on the engine too!
Hello Everyone, I haven’t posted an update in a while so I thought I’d offer a quick update. To date I have just over 400 hours of build time into the project, and am loving the build! I just wish i had more time to devote to the project, but with two boys playing baseball, shop time is scarce.
At this point, the wings are 98% complete with only minor things left (mainly pitot tube installation and riveting inner wing skins which will happen later)
I also have the Rotax 912 ULS mounted and will begin both FWF tasks as well as begin avionics installation. The Onex wont make AirVenture this year, but I’m hoping 2027 is a possibility!
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Looks great Mike!
Edit, I said that the last time, so needed to add something.
Hi Michael,
Got wings! So, long tips or short tips?
BTW, installing the long wing tips is a good place to mess up your rigging. I will eventually have to drill one of mine off and see if I can do a better job the second time.
Wes
Hi Wes, my plan is long wings. I’m a big guy so more lift seems like the best choice!
Can you elaborate on your rigging? I assume you mean one of your wingtips is angled slightly, but I wanted to ask what to watch out for as I fabricate my wingtips. Thank you sir!
Hi Michael,
After building Sonex #664 I was spoiled. The rigging was perfect “out of the box”. I wasn’t so lucky with the Onex. I’m now flying with a big wedge on left wing tip and dragging my left flap to get level flight at cruise speed.
P1040287
Here’s my clue that I didn’t take enough care while installing the tips. I don’t remember worrying about it. I must have just done a “looks good to me” fit.
I guess what I’m trying to say is: "Be careful when you fit them. They provide a significant percentage of the span and need to be fit carefully.
Wes
