At the very least if you decide to run with fenders go to the hardware store and buy some small framing (L) Brackets. They are cheap insurance. If you weld do what I did ... 7 plus years later and NO Fender failures. See my Safe Fenders Album.
https://motorbicycling.com/media/albums/safe-fenders.1277/
https://motorbicycling.com/media/albums/safe-fenders.1277/