you've gone to a bit more effort then i have with capping your roof i cut the front section off and had a look to see if i could fit it on the rear cut as you have but i did my initial cut back in line with b pillar a little further back than you i found it fell too short and didn't want to stuff around so I've got a fabricator making up all the capping panels i think he is going to fibreglass a round onto the roof section for me