Just fitted the replica 323 exhausts I got from CMSL last year (bike nearly done now!) and fit was generally good except for centre stand stop bracket on the lower exhaust is about 20mm too rearward - stand just about sits on the edge of the rubber stop (if you let the stand flick up, it pushes past rubber and clanks into the exhaust). I think I will have to make a plate to put the rubber on and screw to the exhaust bracket.
Anyone else experienced this issue?