[Milsurplus] RUGF Questions

[Hubert Miller]

Some questions about RUGF equipment -
The 0-100 and 100-0 dial scales on the coffeegrinder - please remind me what the different purpose.
A black phenolic tool, looks like a recessed hex head on one end, is that for alignment of the coils? The RU-16/GF-11 manual calls out an alignment tool FR235, but it's not shown.
The actual tool is marked P-257, which is a legitimate number, as the slip covers are listed in the manual with P nomenclature, P-280 rec and P-281 transmitter.
The 'slip covers' i have are brown plastic - do others own canvas ones? I think i have an ARR-1 with a canvas cover.

Also - i have an about 1 ft long 'flex cable' which fits the ARB coffeegrinder - what was this short item used for ?
tnx- 
Hue