MkIII re-visited

[CINDERS]

A while ago I posted a thread on my T G & Co MkIII compass that I sent away to be refurbed and the twaats faffed the rotating index glass and lost a few screws, then handed it back broken and a note with sorry....we cannot fix this?
Anyway have been pondering the solution on the BA screws as a model shop that may carry them is 200+klms away anyway I digress.
I sorta worked out a way to do a reasonable clean of the bowl through the filling hole it is not 100% but at 98% I am not fussed it works.

You will need a syringe I used a TRUMO 12cc and one of those plastic tubes that connects to the spray nozzle of say an RP-7 can or WD-40 can.
Using a 2 mm drill bit by hand just open up the syringe nozzle end enough to accept the plastic tube from the can. (Pic 4)

If the compass has an air pocket in it that's good as it will help agitate the gunk I did not have to remove my bowl from the frame as the filler hole was on the top others may have to remove theirs remember what Peter said about the bellows underneath be careful of them.
1st Step ~ I removed the filler screw and gently agitated the fluid in there as it had an air bubble anyway do not be to rough with it, let it settle with the hole at 6 o'clock position (see pic 1)

Insert the tube into the hole and draw out the fluid re agitate and repeat until all is gone then using the syringe pre flushed with metho (clean it) refill the bowl with metho from the syringe with the hole at 12 o' clock (pic 2) do this slowly to allow the air to escape repeat 1st step until happy.

Now you can fill it with metho which is what I did as I did not feel like driving 27klms one way to get more Isoprophyl, metho is close enough to the refractive index as Peter has said.

With the filler hole at 12 o 'clock (pic 2) slowly fill the bowl until it flows out the hole and keeping the hole at 12 o 'clock put the screw back in but not all the way home just off nipped as we are going to use the sun.
What I did was prop the compass outside with it so positioned the filler hole was up top and the compass was tilted back so the air would gravitate towards the filler hole.
This is where physics comes into it I waited about 20 minutes until I could just see metho coming out the hole and without moving the compass tightened the filler screw.
As the liquid has a greater mass than air when it heats up it will push the air out of the loose filler screw this seemed to work.
Picture with compass flat on desk shows no bubbles and clear. (pic 3)
No bubbles and no gunk just have to wait for a new Index glass (on its way) and hand fit it so here is the guy Peter L put me on to pskettlewell UK e bay for MkIII parts.
And heres the guy in the Netherlands for the index glass on e bay westland*nl

So with that good luck and I know fleabay gets a hiding but it always has a item you may wish and a big thanks to Peter L for his assistance as there have been a few PM's between us.

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