em,i've read the first three pages through,eyes so sore now lol,i have learned a lot,and i have a contribution...gasp!a noob as something to say!
never think u can make everything,for your first ever project,it easier to copy a guitar,even trace it and either do an exact replica,if you are planning to do more in the future,it wont really matter if you have two p-bass's or wateva,cause that was just a practise,or you could trace a bass you already have,and modify it,i traced a p-bass for my design,and my bass,after 3-4 days of tweaking,it looks nothing like a p-bass,and is in good proportion.buy most of your parts eg,neck/fretboard,or just by a pre made neck.i guess u gotta start small,then by you 3rd,fourth,or maybe fifth guitar/bass.u will have confidence to make absolutly everything,and more(fretlights,custom inlys etc.)
and my last piece of advice,never mention vinyl sealer to westheman,he will rip ur b@lls off and slap u in the face with them till you skip home to mumy lol,no offense...well.hope i hav'nt wasted ur time,but just start small,guitar buildings for life,not just for summer