Can someone answer a slightly different question. Does an mc28 adjustable needle use the same type of holder as mc21. I saw a pic the other day that showed a holder that looked very similar to the stock plastic thingy, but had a different spring and a hole for the top of needle. It actually looked quite clever and could probably be made from a stock holder.

I'm on travel this week and don't have the link to the pic on my tablet. I can post a pick next week when i get home or try to find it again this evening.