Anyone undersize their fuses?

Wvbuzzmaster said
Thinking about changing a couple fuse sizes in the fuse box, mainly looking at the radio/back up lights fuse. All that is on the circuit is going to be the back up lights and a volt gauge, so 20A fuse seems excessive. Anyone undersize this fuse to either a 15A or even 10A, or any other fuses for that matter? I have a fairly stripped down setup with no AC or extra electrical burdens so was thinking the stock fuse sizes could be overkill in a couple circumstances. It’s a 1972 Duster and I have all new harnesses due to previous owner had dash fire. Will be ammeter bypassing so looking for other opportunities to reduce risk lol.

I' m pretty sure that fuses and circuits are designed with initial draw and a safety factor designed in. One way to reduce draw , especially on light circuits is to replace every bulb you can with an led bulb. Also, use a relay based kit to upgrade your headlamp system to H-4's. This gives better lighting and reduces the load on your headlamp switch. SlantSixDan is the best source on here for info on these systems. I have his headlight system in my car and it is one of the best upgrades I did.