hole: depends on drum material: steel, ali, plastic etc. Ali could be
repaired with epoxy resin, but certainly avoid the quickset stuff.
Better would be a bolt on ali patch and a load of silicone. Always
scrape ali immediately before applying glue.


Heater element: check element resistance, should be somewhere vaguely
in the region of 20 ohms, might be half or double that though.

Ideally you should also test it with a megger, but most folk dont have
one of those.

It is possible to Check R from heater outer sheath to the contacts on
the highest R range. If conduction is detected it may well fail when
mains V is applied. But for legal reasons I will say only install it
its passed a megger test.


NT