I have an SVX80T-3SV (Not the carbon one) and I reckon it would be too heavy for a Star Adventurer. I am using it with an ASI294 too, I have an ASI2600 on the way with the 294 to be retired to my SCT where it suits the image scale better. I have mine on an Orion Atlas Pro AZ-EQ (AZEQ6 in black pyjamas, basically no difference other than the paint) which carries it with ease. I reckon the whole rig (Scope, focus motor, flattener, OAG, guide and main cam) would be maybe 8KG, but I have never weighed it.
I shot these with that combination, the one around Antares is two panels. As always, mostly they could use more data!
https://www.astrobin.com/full/xpuc7b/0/
https://www.astrobin.com/full/5qg6os/0/
https://www.astrobin.com/full/stjvr9/B/