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i dont own one, but i've used the iphone app "photone" before.. requires a $5 purchase for the full spectrum but its been compared to some of the other popular par meters with some really good results.. check R2R
for sps, bone cutter is easy enough for a branch.
LPs, a dremel would be fine, be sure to cut below the flesh band.
In either case, post frag, glue and frag plug would work. Some people like to do a bit of an iodine dip but not all sps can do iodine dips