actually john to be pedantic.. the very first 415 (TAM58320) came with the 414/TA04 style suspension, which
did have the 1150 bearings, which is what I was refering to in my post
All the cars from the MS (TAM49349) onwards with the Lwt reversible suspension had the 950's.
The castor blocks etc are all the same as on the 416, 05IFS-R and TB03. All the different suspension types can get confusing...
TRF414 (and derivatives), TRF415, TA04, TBEvo3, TA05 - 1150 bearings, non reversable arms
TRF415 (MS, MSX, MRE, MSXX & MSXX MRE07), TBEvo4 (& MS), TA05 R & MS - LWT reversible, 950 bearings
TA05 IFS - LWT reversible, 950 bearings, but with 416 style castor blocks
TBEvo5 - Short LWT reversible, 950 bearings
TRF416 - LWT reversible, 1050 bearings
TRF416WE, TA05 IFS-R, TB03 IFS, TBEvo5MS - Short LWT reversible, 1050 bearings
The only thing you need with the suspension set is dogbones, which given the myraid of options in the tamiya world (48mm, 46mm, 44mm, 42mm) to suit different cars (such as the TA05, TB03, 415, 416, evo5 etc) is probably a wise idea. Nothing else is needed.
I only suggest running the 42's on the rear to avoid any chance of the blade hitting the diff nut, otherwise you can stick with the 44's and just clear.
Ed