I have a Squire Bronco which I am going to modify as follows: > replace pup - probably with a Bassline Quarter Pounder. > replace strings > install ashtray and thumb rest. Because I am not competent to do the work myself, I plan on having a "small" local guitar retailer do the installations and string setup. Certainly, I will buy the strings from the retailer, but should I supply the pup, ashtray and thumb rest (which I would buy on-line) or should I let the retailer do that? This asumes that it will not cost me more to have the retailer supply the parts.