Thank you,
you are right about the body parts needed, however this does not mate with the MC ( metal conduit ).
But it is nice alternative to what I have - I also purchased GSX12 aviation connector it is also not suitable for the MC cable, but this and your suggestions look like a valid alternatives since I can not get Ditron the supply specs on the connectors.
A shop that supplies Ditron DRO, magnetic sensors; KR800MC and tape at 5u resolution has offered to make a new 3m MC cable with DB9 at DRO and round inline MC female plug. They will also supply a round male DB7 DIT type plug, that I can solder on my shortened mc cable to make full connection. AT PRICE of x2 of the standard KR800MC cable - I think that is getting into borrowing of body parts. Would the life be simpler if they just gave me the plug spec.
I will leave this for a day or two before I start again with a fresh approach - perhaps it will be to standardize on suggest splash proof metal connectors.
If you can think of anything along this line let me know - critical point here is MC ( metal conduit attachment from the plug to the cable )
Regards