Any suggestions of where to have Strikemaster service near La Crosse?

This post is probably to late to help but here goes. I too have a 05 Nav with a 60 merc. I run a merc Vengence 48 855858 A 51 13P prop. The Merc is mounted in the middle hole (about 1 1/2 inch above transom) I also have a 8hp 4 stroke yamaha on the back. I had to add a SE sport 300 fin to help with lift. I am happy with the overall performace. Its the same old story, there is no substitute for more horse power.