Skye
I agree totally with Roger.
I ran a Durango throughout the winter in the Ardent winter series and really struggled to get a good result. I saw Nic Caro's FS2 and Ellis Staffords FS2 at the BWOC and they looked excellent. I switched to the FS2 for the last meeting at Ardent and with it built as kit i put it straight into the A Final. Now the Durango is obviously a great car but it just did not suit me. I have raced the Kyosho for a summer season now and despite some large crashes i have not broken anything (touch wood). I have fitted longer bolts as suggested by Roger and turned the bolts around on the top shock mountings. I think this helps a great deal.
The Diffs when fitted with ceramic balls are awesome and have not needed any maintenance for an entire season and are still extremely smooth. The kyosho big bore shock springs are very expensive but Losi 22 springs fit and they are very cheap.
The other good things are that rear toe in, anti squat, front kick up caster and are extremely adjustable and it all comes in the kit. Unlike other makes where you have to buy upgrade parts.
I can't help with the B44 as i have never driven one.
If you want any help just ask.