# Unifoil fuse compatibility (1 vs 2 bolt) **URL:** \ **Category:** Foils and Boards - Gear Talk\ **Created:** [July 29, 2024, 4:47pm UTC](https://forum.progressionproject.com/t/unifoil-fuse-compatibility-1-vs-2-bolt/6294 "2024-07-29T16:47:32Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![Matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@Matt](https://forum.progressionproject.com/u/Matt)\ **Post date:** [July 30, 2024, 7:51am UTC](https://forum.progressionproject.com/t/unifoil-fuse-compatibility-1-vs-2-bolt/6294/6 "2024-07-30T07:51:42Z")
It was just less effort to sand, was about 1mm, barely noticeable, but yeah either or. Sanding the old 190 was the idea as I didn’t know if I’d even use it much, I didn’t. The issue was bad fuse/mast tolerances, I couldn’t link more than 2 or 3 waves on the vyper 190 where i was having no trouble linking 5-10 on progression. Put it down to wonk on the connection as pumping was a pain - [short clip](https://www.youtube.com/shorts/YFRnil9H77s), if the pump was very neat then fine, but if any wonk to the pump it was super hard to recover… discussed [further here](https://forum.progressionproject.com/t/front-foil-upgrade-advice/3907/15) --- _[View the full topic](https://forum.progressionproject.com/t/unifoil-fuse-compatibility-1-vs-2-bolt/6294)._