aka fizzbangwhallop on here too.....
i use use one of Bojan’s (aka zruncho on ebay’s) Long rear extended rails in conjunction with a kalixteknik cheek riser on my off-road Pro R93 for both the Drone Pro and a Wardy WT1 75-3 thermal. Bojan/ Zruncho is US based but it’s posted from Europe.... there’s also a U.K. based seller: artbymaria but I’ve bought from Bojan a few times now without a problem.
There’s also a slightly shorter rear end, lower rail which I’ve used for the DP without the kalixteknik without a problem before the longer rear rail came out.
Found it...
https://www.ebay.co.uk/itm/Blaser-P...911165&hash=item237bb2719e:g:I7AAAOSw5cNYfV6L
And this is the slightly lower shorter one...
https://www.ebay.co.uk/itm/Blaser-R...043301?hash=item25cd3be065:g:OFcAAOSwA3dYfVp7
The £ must be good at the moment.
Cheers
fizz