I will lend you a file....
Fitted an EV2 wind indicator to mine and the file did the job perfectly. I also ditched the 'A' frame so barrel is fully floating. The Wind indicator takes up the space where the A frame was.
EV2 Mk3+Sightron SIII 10-50 x 60 LRIRMOA / Bushnell 8-32
Theoben Rapid 12 FAC
GROWING OLD IS NOT FOR SISSIES