I love pin skates, particularly when on my padded carpets. They work where the Escalera doesn't.
Except for one bit about them. I can never seem to press with with pressure with my fat fingers to get those damn nubs to go in enough. Nubs, I hate you.
So I made a stupid tool. A button masher, with a bigger surface for my thumb, that'll automatically go to the right depth (and no more, and no less). The washer at the end helps set that depth to match the thickness of the square tubing the skates are made from. It's a 5/16's bolt, which has just enough of a rounded scoop at the end, to hold the nub. That big washer makes it so I can also grab it from around different angles with my fingers, when my thumb is less handy.
When I get bored, I'll probably see if I can do it without the pair of nuts; and just grind the bolt down to the right size, and make sure the the end is bowled out slightly using the Dremel.