I hear you. I thought it might be a bit tight.
I like using alloy angle for bracketry. I'm thinking of a bit of unequal angle with the top horizontal leg long enough to give clearance from the spring. Then the P clips bolted to the vertical leg so the bolts wouldn't need to be on the frame hole centres.
The P clips would be stronger hanging that way round too.
I'll probably never do this, but it would get rid of those horrid jubilee clips! Probably an easier way to go in the absence of an original bracket though?
You've got me thinking about CF too..
