I want one. Please inform me of your progress.
And, yes, I need one.
I regularly compete in a local vintage military bolt action rifle match that usually has a stage that requres a reload (10 rounds total). If you are shooting an Enfield, obviously you don't need to reload. However, I don't like my Enfields. They don't shoot good enough to cut the mustard in this match.
I shot a K31 in this match for a couple years but have shot an 03A3 for the last 3-4 matches because of the better sights.
However, I could be tempted to go back to the K31 ( I have been thinking about it anyway) and this mag would certainly push me in that direction.
There is another match that interests me, called the Lord Robert's Match (do a search) where this would come in very handy.
I don't see anything "nuts" about it.