DrH - the drawing I have sent you is already stretched from stock, by 7mm. I wouldnt be surprised if the Magnum chassis is around 7mm longer than the stock FF chassis, and I expect it uses the same shaft as the FF, but Ill try to find out. I wouldnt get too hung up on the centre shaft length if you are planning on working from the drawing I sent. Having said that, it would be nice to know the length of the Magnum shaft. But the stock FF shaft WILL work on the stretched drawing I have sent to you.

As a point tho - FunFactor spares are a lot easier to get hold of than NX or Magnum bits, so I would prefer to stick with FF parts.

The rebates are not necessary, but look nice. I left them out due to cost, and people having slightly different arrangements on their chassis'. They dont let stuff sit lower on the chassis as all the mounts are the stock ones - so they are pretty pointless rebates really.

My truck is still completely stripped down, but I do have these photos on my hard drive if they are any good to you. I cut that purple piece from the stock FF front top plate, it does help a lot, but doesnt cure the flex on its own - is that the kind of thing you were thinking?