I am building my 3 year old daughter Harriet a Toylander, I have sourced some old mobility items classed as un economical to repair, I have built the body and fitted and butchered all electrics batteries and motor together. Problem I now have due to fitting bigger wheel and tyre combination I now have to reprogram to increase speed and/or torque. Now I am totally stumped....All seems fine on flat just loose power on slopes or driving over garage door frame. I believe I can make a lead and download software for my needs, any help much appreciated.