Q&A:
Waterjet:
I don't own the machine, I access it up at my work - but that machine is SOOO handy to have. It's quick and can cut pretty much anything with ease!
Camphour:
The camphour holds paint and stain very well... it's a little dark so staining has to be deep but for a burl it takes stain and paint very well! I had a few troublespots with some little knotty areas but was able to mostly position them off the guitar. This type of wood I think requires filler, like mahogany, esp. with all the little oddities over it. One thing I want to optimize with this wood is getting the bookmatch closer... Since burls can get VERY hairy during drying, it is easy to loose closeness in match due to material loss after getting them milled flat. I didn't realize how wet it would actually be inside after sitting for so long but I think ideally, one would not cut the wood in half until it was totally dry as a whole - unfortunately this could take years! This is why I'm starting to hunt down all sorts of top billets for any future builds that may come up.
Pivot Q:
Since material was removed from the rounded K.E. , the opposite stud had to be repositioned in order to keep the bridge perpendicular in the body cavity at rest. Another thing I noticed was that the actual K.E.s 'out of the box' were NOT on the same pivot line when I measured off the actual bridge for dimensioning. But you are correct in stating that a pivot cannot be on 2 axis and still keep the bridge at the same angle (or distance to the nut IOW) through it's travel. I don't find this an issue since the strings do not loosen in relative tune anyways (the looser strings will flap out first, etc...). In either case, I only took appx 50 thou off the rounded K.E. As far as friction is concerned, I don't think 50th will affect anything major but I will find out after a few years I suppose? The K.E. shapes also cause an imbalance in wear since the upper is flat and the lower is rounded and has more contact area to the pivot. Also, guitar strings are not the same tension and when doing dives on the trem, the tension of the lower strings drops (to 0) much faster than the high strings so I think any sort of friction-balance issue is a mute point for this type of setup? What do you think?
I also wanted to do an experiment by changing the K.E.s with each-other so that the dive or raise was more 'evened out' since you could make the change in distance to the nut greater on the high string side. This would help esp. for me in the 7 string world where a trem dive will flap the B so loose it will contact the other strings yet still have a lot more to go on the highs, which would open up more pitch shift range for the rest of the strings. The change wouldn't be significant by any means since you can only remove so much K.E. material but figured it couldn't hurt to experiment. BTW, the process is reversible if I wanted to take the time to re-machine some pivot studs and repl. the K.E.s. I will be building another one or 2 of these and will see if I can distinguish changes in trem feel/wear/ability, etc... I simply like to experiment - since it's mine I don't mind one bit if I can gain a little knowledge!
Thanks for the replies and the Q's!
Phil