So, here is the feedback, I've promised to give: the
Guardian Shard Cutter has not worked good for me
It hasn't done anything at all, because .... I got mad of the imperial christmas tree with thousand of lamps flashing with and without reason and white glossy panes dazzling me at every second turn
So I stored the engineered modules (just in case) and sold the Cutter.
But thanks to that imperial thing, I've learned about how useful the blue zone of engine is on a big ship. So I gave a second chance to a Corvette and I like it really at this time. The planned AX build will be this one:
Guardian Shard Corvette . For this I've to head again to guardian sites to unlock the fixed variants of the guardian shards.