Here it is with mm conversion! Thank you for this handy chart.
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2.54mm it is then!
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Is there any way to convert my crappy 2D image into a 3D one?
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There should be a Revolve tool that can make 3d bodies from the sketches.
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Hey, I took your picture and recreated a 3D model out of it for you. Let me know if you want the dwg or stl
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Wow nice!
I’ve actually beefed up the rims more since then and made the minimum wall thickness 2.5mm
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I see, it’s going to look very cool when you make it. What program are you using?
QCAD. And I’m very rubbish at it.
Every new program has learning curves, you’ll get the hang of it. If you’re having limitations when it comes to the programs capabilities, there are a plethora of CAD programs that are free. I believe Fusion, which is an Autodesk software, has a popular free version (for hobbyists only).
I use AutoCAD which is kind of overkill, but it’s what I have access to. It’s pretty expensive though for a full license.
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Can anyone provide a Fusion file that is a starting point for using FH/BigFun guts, or maybe a ProYo transaxel ‘seat’? It’s what I have and can remove to experiment. I’m going to get weird with 3D printing.
You might need to get a set of calipers and measure those guts yourself. Not really aware of one pre-existing.
Well considering this will be the first time even GLANCING at a CAD program, I think I’m in for a lot of learning.
I have the guts for a size C bearing from my first prototype if you’d like that. Or metal drifter guts (Duncan size a bearing).
I’d assume bearing-to-plastic is a bad idea, and I don’t have Drifter Guts sitting around. I’ll have to measure the guts I do have when I can borrow a good set of calipers.
I think I’ll start with the ProYo transaxle. Keep it simple for my first time.
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what does the cross-section on that bad boy look like?
Bro… I don’t even know how to get there again lololololol
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I know what you mean, it took me like a day and just under an hour of online searches to figure out how to do that lol.
If you’re using Fusion 360 (which it looks like you are), you make things visible or invisible by clicking the little ‘light bulb’ thingie beside each of the ‘layers’ - a layer being either ‘body’ (which is the 3D rotated body of the sketch) or ‘sketch’ (which is the 2D sketch you originally made).
If you de-select the little light bulb beside ‘body’ and you have the ‘sketch’ light bulb lit up, then you can see your sketch again. I recommend to make edits to your sketch, and not the body, if you want to make changes to the yoyo. But, whatever floats your boat 
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If the Duncan imperial is still being sold then I think that design has a place in the world. It’s valiant first go, just set some goals on how you want it to play and look, then figure out what design steps will get you there. All part of the process my friend.
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