Deeper fishfinder boat holder v2

New version of my deeper fishfinder holder ( https://www.thingiverse.com/thing:1611206 ), new features:

2 arms instead 4, with holes for skrewing knobs/loops when not using
Optional pin for gluing on bottom side of main part instead of using knob (prevents hooking up of water grass)
Using more common M4x30mm bolts for arms fixing
One piece main part

You will also need:

4 x M4x30 bolt
4 x M4 self locking nut
1 or 2 x M5x25 bolt

For 12 mm tube mount:

1 x M4x30 bolt
1 x M4 nu