Jack I love your "Photo-Etch" front fenders, I always make my own and I cheat, I buy the "VOYAGER" front & rear fender sets,
Because the brass sheet is so thin I cut 1mm plasti-card to shape and glue the PE to the card then using dolls house accessories website hinges,
I pin vise the hinge holding holes and push dress making pins through the holes (I use a block of soft wood as a template to hold everything together) then a spot of superglue at the point the pin comes through the hole,
Let it dry and clip the pins flush to the plasti-card back.
You now have a set of fenders with the bolt/rivet heads finishing off the look.
All my Tigers have properly working front and rear fenders and they are much tougher than the original PE fenders.
Dress making pins come in different sizes so you have to see in your minds eye how big the Bolt/Rivet heads would be when in position to get it looking right.
If your into detailing this can be very satisfying

shaun