A few wraps of tying thread around the rod can work, too.Thanks, Steve - I will do some explorin' around here. If my memory serves, the "tube flies" I shared above, were tied on hard plastic tubing (I seem to recall it was hydraulic tubing). AutoZone doesn't carry anything like that so...... a bit more checking.
Very nice offer, Jake! Perhaps if time and circumstances permit.
Those "tube flies" of mine tied before we moved to Ephrata (therefore before March, 1986), most likely 1980/81, were tied on an old Thompson vise. I seem to remember I jerryrigged a clothes hanger with electricians tape to hold the tube from spinning. (The memory could be a fantasy or figment too.)