@medallian
Garmin has not yet posted any production version fw updates for 42/52 as yet:
Code:
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When Garmin do post a new fw it will be available for dl shortly afterwards as well from [Only registered and activated users can see links. ].

AFAIK nobody has flashed full x2 fw to a x0 device. Like 34x0 fw to 39x0 hw that may work fine, or it may brick your unit. Best to keep using x0 boot bin, unless you would like to try the full x2 fw, that is? I think i'll wait until a Software Expert has looked more closely at loading addresses etc.

While your HWID is still 1350 (x0), WebUpdater will always offer you that fw, not for HWID 1595 (x2).