Hello
I just joined SGL, but have participated for some time on Cloudy Nights in the EAA and Planetary lucky imaging forums.
It looks like you have all the pieces for a very good EAA setup, once you get a shorter FL OTA. I use a 80mm ED refractor for my wider field imaging.
I too, have used the SW az-gti mount with wedge in equatorial mode, but alt-az is fine for EAA. That should bring the weight down in the range you are interested in.
My camera is an asi294mc-pro, but yours is fine for the purpose.
I can't say enough great things about Sharpcap as well.
Bob