Z block maintenance

My printers z moves down on its own extremely easy. Just someone walking buy while its not running can make the thing spin down to the bed. When I need to load filament, change the nozzle, clean, maintenance , or anything that involves the z being up at all I have to basically do it one handed because it wont sit still and have to hold it. I made a z block. I have it under it when the machines off or I need to work on anything.

the slot for the gantry to fit in is 22mm and it has a relief for the belt. The side slot is for clamping rods for drilling and taping and such.

I put the big hole in the middle just because.

You can use any type of filament you want.

overall size is 100mmX50mmX30mm

i have more ideas for printer tools coming. This is just my fist.