For me, there are a few reason's I'll either change or leave a pad.
1. If the pad is full of crusty....."stuff".....and I can get the majority of it off with Naptha, etc, AND it still seals AND it's not rock hard, I'll leave it.
2. If there's a leak and I can successfully re-float the pad to attain a good seal, I'll leave it.
3. Even if the pad looks good but re-floating fails, I replace. For me, the biggest reason re-floating fails is because (I find this out after I remove the pad) there is honestly little to no shellac or hot glue in the pad cup. How that pad even was staying in the cup sometimes surprises me.
I agree with Jaye that it can also be up to a customer if they desire the same "feel" throughout the horn. Older pads that have hardened a tad mixed with new pads that definitely have a different feel/pop sometimes doesn't matter to a customer. Sometimes it does.
1. If the pad is full of crusty....."stuff".....and I can get the majority of it off with Naptha, etc, AND it still seals AND it's not rock hard, I'll leave it.
2. If there's a leak and I can successfully re-float the pad to attain a good seal, I'll leave it.
3. Even if the pad looks good but re-floating fails, I replace. For me, the biggest reason re-floating fails is because (I find this out after I remove the pad) there is honestly little to no shellac or hot glue in the pad cup. How that pad even was staying in the cup sometimes surprises me.
I agree with Jaye that it can also be up to a customer if they desire the same "feel" throughout the horn. Older pads that have hardened a tad mixed with new pads that definitely have a different feel/pop sometimes doesn't matter to a customer. Sometimes it does.