I've seen/read the lot of sail cleaning and such reviews and posts. There are a few that list that they do their own sewing, etc. One responder even went so far as to caution against blisters, as the task could get mightily stressful on the hands.
Are there any intrinsic problems with sewing/repairing one's own sails? Examples might be using the wrong thread and "cutting' the fibers; or bungling the stitch line and puckering the seam? Perhaps using the 'wrong' material for a patch? Using commonly available hardware vs. 'marine'?
I can sew by hand. I can sew leather in a variety of stitches, and have done heavy canvas and nylon GI materials. Not looking to cut'n'sew a complete sail... just taking up repairs and maintenance.
In answer to the 'blisters'? I seem to recall from somewhere (mebbe the Blue Jacket Manual?) a leather "palm" to support and sew into. Also believe there was some sorta abbreviated glove on the needle hand to keep from pricking thru while pushing. Somewhere along the way of Life, I collected a sewing needle set that had several heavy pieces that were listed as "canvas and sail makers" gear. Hope ta find them soon!
I 'spect I'll have lotsa time ta take these chores ta hand