Zelige

That's exactly how I got going - I saw Jimmysmooth's fabulous conversion and thought, hmmm...

Thanks - was your 'start current' adaptation with or without the open source software?

Thanks! I took a lot of inspiration from Jimmysmooth's Bafang Raleigh20 here

You're right. Pretty much all riding on the flat is in top gear. We've some very step gradients so am glad of the low gear, but yes the intermediate spread isn't used much. One thing I'd point out to newbies (including a reminder here to myself) is that setting off in turbo mode in low gear can be risky as the brief but powerful acceleration can lift the wheel and/or accelerate the bike off course and into danger.

Yes, 4 x stainless steel M6 rivnuts for battery mount. Despite getting flat head M6 screws for the rivnuts I still had to Dremel recesses into the battery mount so it was flush to take the battery. The black blocks are pieces of semi-rigid foam that I cut from the battery packaging. The idea was to slightly elevate the battery mount from the frame to avoid it scratching the powder coating.

Dear all, thanks to the enthusiasm and discussion on here I've finished my build. It's a Raleigh 20 frame with a 7 speed rear hub, a Tongsheng unit and 17.5Ah battery. It's a lot of fun! The bottom bracket had to be ground back on the RHS by about 5mm (as was a welded prop stand attachment ), a DIY drop bolt was necessary for the rear brake and I've had to mount the twist grip on a handlebar extension as it wouldn't fit the bars themselves. The frame was powder coated locally. I mis-ordered the seat post years ago - it had hung around in the bike box and I was very pleased to find it fitted the frame perfectly. If I did it again I might go for front shocks and custom weld a rear brake support to avoid the need for a drop bolt. I'm wondering about the next project and considering an old recumbent in the bike shed which would benefit from a motor.

If you're after steel frames, keep an eye out for cheap On-One bikes. They do a lot of steel builds. I've picked up two On-One Inbreds for £100 or so in the least 2 years. Beautiful bikes. Oh, hello all! Been lurking for a while. Just ordered a Tongsheng kit from AliExpress to fit to a Raleigh Twenty.