Hi,
I am retrofitting a B.P series 1 Interact.
I have most things worked out, but I am wondering if the original vari speed can be integrated somehow.
Does anyone know how this system works with regards to the actual increase decrease part,
I realise the 2 disks close or open to actually change the speed. its just the HOW part I need to understand.
any help welcome, as all browsing brings up in any detail is the hand cranked manual version