Originally Posted by SteveH

1.5 (maybe 2) Easy Peasy

Miriam is correct and explains the possibilities for most any machine. For the 28/128 that you were looking at, a flat blade screwdriver should be enough (a single hex head bolt with slot for screwdriver is the only thing holding that machines stuff on) If it is too tight for a screwdriver to remove you can use a crescent wrench (adjustable wrench)

No notching required as it has the spoked handwheel.

Steve