For sale is one of the latest strain wave mounts from iOptron, specifically the HAZ31, which has a carrying capacity of 15 kg while it weights less than 4 kg! As you can see from the pics below, it is very very compact.
I have been using it as a travel/visual-only mount. It has travelled with me to Aussie for last year's total solar eclipse. It had no problem handling a 92 mm refractor + a 500mm camera lens mounted on top. I imagine it would not have any issues handling refractors up to around 120 mm.
I currently paired it with a carbon fiber tripod (Innorel rt90c) for easy portability (I can lift the mount + tripod with just one hand), but you can use any tripod with a central 3/8"-16 bolt.
The mount is around 9 month old and it is still under the 2 year warranty from iOptron. It was purchased from Agena Astro.
Selling this mount to fund the upgrade to HAZ46.
Price: $2650, includes a carry case, 1 x hand controller, data cable, and an AC adapter
Full spec and description here: https://www.ioptron.com/product-p/hz312.htm