+1 on the Templaco boring jig. ?
I install a fair number of doors, and it's really nice to just roll up, make one mark, clamp, bore, remove assembly, install handle, route for the plates using the supplied templates, and get on with my life.?
The advantage of the Templaco kit is that, in addition to the cast iron drilling template and carbide-tipped drill bits, it also includes routing templates for the handle, dead bolt, strike, and a marking point for transferring locations from the door to the jamb. Once you've marked the handle location, the rest is more or less "automated". Yes, it's $500, but in my opinion you get a lot of kit for that price.?
That being said, if you're performing the work as a hobby, then yes marking each location has worked well for generations, it's just much slower.?
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Tom Gensmer
Heritage Home Renewals, LLC
Minneapolis, MN
Tom Gensmer