I use the 27.4 mm diameter mandrel for the JMP EL-2 jack to lift my 2020 KTM 1290 Super Duke GT motorcycle. This is my next JMP jack and another good product from this company. I'm not afraid to lift the motorcycle and even sit on it when it's lifted - it holds securely and stably (of course, less stably than propped up on either side, but it's a monoshock after all).
I think that the products of this company, and the jacks especially, are very well designed and made. Rigid large-diameter tubes, bearing wheels as well as the shank itself. Probably for professional use one would have to look for something else (lifting many motorcycles a day) but for home use it is a great choice. It's definitely worth paying a little more and not getting frustrated than to combine with slightly cheaper but certainly inferior products.
The 8mm side is a bit too weak. It seems to me that a 10/15mm variant would take care of the problem or a change of material. The motorcycle weighs 200kg.