Welcome to GroupDIY!
[...]Mike from Whistle Rock was working on a dedicated HiZ Plug-In 500 series module that will be cool and pretty versatile. I am not sure how close to ready he is though.[....]
...The HZ51X is almost there... damn metal shop is not getting the bracket right and I keep on rejecting samples...
Front panel space is tight and behind the faceplate as well with the t-pad. I have had guys omit the t-pad and slap a 1/4" jack in that hole. IMHO, the t-pad is more important though.