Tax Neo and disc brake bikes

I’m a newbie to turbos and have invested in a Tacx Neo but have a Giant defy disc bike.  The disc callipers are hard up against the side of the Neo (after adding the 135mm axle spacer too).  I’m concerned at the extra stress this will put on the calliper contact point with the seat stays because they will flex under power but the calliper can’t move.  

I have searched the internet as much as possible to see if anybody has experience but I can’t find anything and the Tacx forum seems to be rarely used so I thought I would try the trusty road.cc forum and see if any of you chaps/ladies have any advice.  I’m guessing it will be the same advice for any other direct drive trainer if the calliper is up against it.  I’m wondering whether it is worth changing to a different brand.

Thanks