Chris10 wrote:
I've seen it before on bikes that get a lot of trainer use. The corrosion is from the sweat.
I used an electric drill and carefully drilled the head of the screws off. Have to be careful and start with a small bit, like 3/16", and slowly move up sizes until you shear enough material to break off the head, then use a pair of needle nose pliers to unscrew the rest of the shaft (once you get the lid/base off). If you can get a reverse fluted bit, that would be better as you might be able to catch enough traction on the screw to back it out before having to remove the head.
The alloy they used for the screw is not very strong, but it is light, and probably why they used it. I replaced all of them with 316 Stainless Steel ones. Use a lot of anti-seize on the threads in the future.
This is extremely risky, as damage to the Aduro bar itself (i.e. not the top cap if you're using Low V or part of the High V if you're using the High V) is very pricey.
Those bolts should be checked monthly for corrosion and or damage. I used to take them out (and the ones that attached Low V to the Aduro basebar) and clean and re-grease them at least that often.