Hi Dave
Thanks for the feedback. re: your attached image......"them's the connectors I was looking for"! They are slightly lower than the std polarised SIL!
As usual Dave.....your always one or two steps ahead!
As for a flanged case....I was thinking it would easy to just use some sticky pad under the case and wrap zip ties around the OTA so they hold on to the flange lids..simple...well for me but of course this may not suit others.
Brendan