Hi Garry
Mine is a B44 but obviously almost identical anyway ........
Ive been told that fitting the speedo and motor on the same side affects the handling. However, using a setup from Rich Lowe and some lead on the opposite side it felt dialed at Worksop last meeting.
Pic shows NimH but with Lipo and a lead plate underneath, it was pretty well balanced on my 4 digital corner weight scales.