Anti-Seize The HMD Current controllers have an aluminium heatsink with several screws that mate directly with it. The screws are made from 316 Stainless Steel for corrosion purposes. Unfortunately this can be an issue with the aluminium and the stainless reacting with each other and locking the screws in place. At Main Roads they used an anti-seize paste on all bolts into the Troxler case. They used Loctite Silver Grade Anti-Sieze. This has worked well for HMD as well. The 500g container is pretty messy to work with. The 250g tube is better. Manufacturer - [Loctite](https://www.henkel-adhesives.com/au/en/product/anti-seize-lubricants/loctite_lb_8150.html) Suppliers - Sydney Tools [Loctite LB 8150 SV 250g](https://sydneytools.com.au/product/loctite-lb-8150-sv-471321-silver-grade-antiseize-lubricant-250g)