Max fender size for 650B x 47

Hello,

I recently picked up some PDW full-metal beast fenders (55mm) and the fit seems too close for comfort, both to the frame/fork and tire.

Can you recommend the max fender size (width) running 650B to safely fit the flaanimal 4.1? And maybe even better, some product recommendations?

Im not needing an exceptional amount of clearance for mud buildup, just Portland wet grime mostly. I’m running 47 mm Teravail Cannonballs and wondering if I need to downsize. Or alternatively, upgrade to a 5.0.

thanks!