Cheers @PotatoFarmer . Just got my printed parts. Will print gears later just using a lawnmower ring gear for now.
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Its still fascinating seeing these gears pop up in different colours around the globe, very nice.
The original set is still going strong, hopefully they give you the same service life as well.
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Hi PotatoFarmer,
Can you quickly give me the link to the google drive containing the universal system. I’ve seen a number of referral to the drive but not the exact link.
Thx.
Its in the first post in this thread:
thx for some reason I missed it.
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Briggs and Stratton ringear?
Yes a bit noisy so will replace but bought it early on as it wasn’t dear.
As long as it works, I was considering the same thing before getting a 3D printer.
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What printer did you buy?
I bought Creality Ender 3 V2 Neo. Decent bit of kit, but it might struggle with TPU. We’ll see…
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Just slow down print speed to 25 30mm/s and stock ender 3 v2 print TPU good.
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Experienced the same jump in quality slowing down a small amount from the advertised max speed.
My printer, sermoon D1, has become discontinued 
So it runs as long as it runs.
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I finally modified my Ender 3 V1 the other day to do TPU and it worked great on my demo print. Looks like the Ender 3 V2 Neo has the exact same extruder plate that you may need to replace. This is what I printed and installed:
It seems to work pretty well at 30 mm/s.
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Speed speed speed 
100m/s PETG. Work is very vel.
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A core XY printer is on my list to get some time. With input shaping seems like the speed out of a core XY can be way higher than my bed slinger.
As I mentioned, I had a great result with TPU on my Ender 3 doing a test XYZ cube at 30 mm/s. Then I had some PLA to print and when I came back to TPU I just couldn’t get it to print right at all. Under-extruded. I cleaned out my nozzle really well and even put in a new bowden tube. It was better but I’ve found if I slow down the feed rate to no faster than 25 mm/s and it’s doing well. So quite slow, but the quality is pretty good.
Probably it might be best if I kept just one printer for TPU (a direct drive), and then the other printer for PLA and PETG.
I don’t understand the TPU. I use PETG for everything. No wear after 300 hours.
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I just printed TPU for fun mainly. And I could print friction wheels for rubbing on the steering wheel directly.
Maybe a TPU spur gear might be quieter than a PETG on PETG gear.
PETG on PTEG is great till its not, then it shreds. The first sets I made before ACS712 and the Cytron mod died unpredictable powdery deaths. Also my tractor is open station and very loud, could hear them clacking together over the engine noise.
PTEG on PTEG was not bad if the teeth chewed out of the small gear. But before making the three segment style removing the steering wheel every large gear failure got annoying.
So to save the big gear, and ensure that the small gear would take the damage went with TPU. Still no significant wear to speak of.
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What would be the best filament for friction wheel?
You have .stl that you could share?