Did you buy a replacement screw or did you leave it out?Happened to me. I used a pair of grips to undo the screw. There is just enough protruding to get a grip.
Why the fixed-wheel specificity?according to one lbs, the trick is to remove the grub screw straight after purchase (but don't do that on a fixed wheel bike).
I may have to go down that route and buy a new pair.If cutting a slot didn't work, I would bite the bullet and buy some new pads and holders. It will be the usual problem of galvanic corrosion, i.e. steel screws in aluminium holders - anti-seize=so**ing unremovable screw. If you get new ones, use Coppaslip on the screw before you fit them to the bike. Keeps blood pressure low too.
Hi, What's an HSS bit?Just drill the head off with a HSS bit, it will take seconds, it shouldn't damage the whole cartridge holder at all if you are careful.
Remove the whole pad first of course and lock it in a work mate if you have one, although you can do it free hand on a table if you are good enough.
High Speed Steel drill bit.Hi, What's an HSS bit?