Cheers HM, thanks for the heads up on Chesil and the 550 screen. Out of interest, how much did they charge you for the complete screen assembly? I believe Martin & Walker retail theirs for £500 all in.
Oh, and I'm going to be designing my own internal framework for the Speedster I'm building so mounting the screen posts won't be a problem.
Good luck choosing a colour - I love silver (obviously) and I found it to be a very forgiving colour for an amateur sprayer, but that black and dark green finish on the Vignale Spider does look fab, and I have a feeling that dark colours might just suit the larger G46 slightly better than light colours.
Keep up the good work.
Oh, and just found the link to Chesil's accessories page so I've answered my own question -
http://www.chesil.biz/Chesil_Prices_K.htm