Since this is the luthiers corner I would never want to persuade someone from building a guitar, but this is the risk you take when getting a custom made guitar built to spec. Not to mention that resale value is horrible on a non-Gibson Les Paul so if you were not happy with the Precision guitar you are going to have a lot of trouble selling it, and certainly lose money on it. Again I don't want to scare you away from the fun of having a guitar made just for you, but the cost of having Precision do a custom neck profile, finish the guitar, etc. is getting awfully close to the cost of a used Gibson Les Paul, which would come with the added bonus of you being able to play them and find the perfect neck for you or be able to sell and try again if it doesn't work out. Just something to think about... All that being said I don't have any experience with the newer Gibsons, but I've actually heard a lot of people really like the asymmetric neck, and if Phil has done them before its all cut from the same CNC machine so its not really much more difficult for them to pull off. If I have some free time tonight I can try to snap some pictures of the back profiles of my 90s Classic, the '59ish 335, and the Precision '60 to try to give you some visual comparison of the slim profile on the Precision.