Stipping glass is a bitch and there is no other term to describe it! I have used a Fein Multitool in some cases. But when push comes to shove RFNK's method works every time.
I think that I can speak for everyone when I say that we greatly admire your fortitude! Once the grunt work is over, your creative work will be the reward for your efforts.
Personally, I like the ketch rig better than the sloop. However, as mentioned before, "Bright Star" will soon sport LFH's sloop mast which is four feet taller and retain the mizzen mast for sailing off the wind. There are great advantages to having the mizzen for balance and setting greater area when it is time to fly kites.
Jay