Two starting to make real differences are the GM one from London Club last year. Still not getting the swing as short as I'd like but my performances are getting better and more consistent and handicap is trickling down. The other was a linear short game method one with Gary Smith. As self taught it was pleasing to hear him say I was really close and the lesson was only a few minor tweaks in set up and then refining it. Have opted for linear for the foreseeable future and working really well. Scrambling really well and confidence improving all the time