Sharpstar 2.5" flattener for 115mm APO

[Deeko]

I am looking for a flattener for my Tecnosky 115mm APO. On the same page as the telescope here it links to the recommended flattener that is currently out of stock here. The linked flattener looks a lot like (specs are the same) the TS Optics  2.5" flattener with M68 thread here which FLO also sell for £293. I know lots of these flatteners are just rebrands which made me search a bit further and came up with the Sharpstar 2.5" flattener that upon looking at specs it also appears identical to the previous flatteners I linked to except it comes with an extension adapter and is cheaper. Does anyone have experience with the Sharpstar flattener or have info that may backup my thinking around it being the same flattener as the others I linked to?

ta! D.

Edited April 5, 2021 by Deeko