HP-21 Disassembly Help...

[Dave Frederickson]

(03-27-2016 04:36 PM)Geoff Quickfall Wrote:  I suggest getting the finest bit you can get, 1/32nd, 1/64th. If you have a Dremmel stand and are able to set the drill depth then that is the best option.

Any concern about debris from the drill getting under the dome? If smaller is better then a size 80 (0.0135 inches) drill in a pinvise could be a consideration.

(03-27-2016 04:36 PM)Geoff Quickfall Wrote:  I use deoxit red which contains a solvent which is safe on all plastics and a deoxidant, then as Katie mentions, introduce a fine bent wire into the hole and twirl it cleaning any oxidation.

By "red" you're referring to the D100L, as opposed to the "Gold" G100L, formulation?

Dave