Hi.
The mod is obviously not swappable back and forth easily, as You have to carve a new nut for the beefier strings.
Another "obstacle" is the saddle height and the saddle groove. Some of the 4-stringer bridges/saddles are not designed for .135 strings. OTOH some saddles can not be lowered enough for the normal .135 string without reworking the groove.
Some (Skulls for example) .135s have an exposed core that renders them useless if there's not individually adjustable saddles.
Sometimes there's not enough adjustment on the bridge to back the B saddle far enough to intonate it correctly. In that case a 5-10 millimeter bridge relocating is a must.
I'd suggest that You find an another bass to string BEAD, you won't regret it

.
Regards
Sam