Linhof Digi-Adaptor 1693

Hello i would like to know if anybody has this option for fitting your DB onto ones 4x5in in my case
my Sinar, it is a Graflock mount so it will work. And i do have the v mount.

I have seen this item at £149 so maybe this an affordable option, especially for still life where you do not have to instantly slide the DB into place as with the Kapture group adaptor which i think is very expensive, it would fit exactly as my Linhof 6x9 film back. (mint and i probably will never use it again)

Regards
Terence Hogben