Just got the reply of a judge which is also participating on Ironman events about this product:
https://www.rockerplates.de/BTA-Flaschenhalter-Basic-Mount-Canyon-SLX-CFR
According to him, this product '(BTA - Mounts), bottlemounts between the frame, will not be forbidden if the main purpose is the to carry the bottle...or carry tools (toolboxes) or rest the arms...so he told me, if tape is used to only minimizing aerodrag..dq or take it off, if the tape contents tools in between..it is kind of his own decision if it is safe or not..
So alot of interpretation possible, but all those toolboxes and 3d printed stuff should not be banned according to him...
https://www.rockerplates.de/BTA-Flaschenhalter-Basic-Mount-Canyon-SLX-CFR
According to him, this product '(BTA - Mounts), bottlemounts between the frame, will not be forbidden if the main purpose is the to carry the bottle...or carry tools (toolboxes) or rest the arms...so he told me, if tape is used to only minimizing aerodrag..dq or take it off, if the tape contents tools in between..it is kind of his own decision if it is safe or not..
So alot of interpretation possible, but all those toolboxes and 3d printed stuff should not be banned according to him...