Probably Simplest Dyson Trigger Lock with rubber band

thingiverse

The dysons are nice but holding the trigger for a longer time can really cause pain...A lot of solutions in here seem to be nice but are in your way, whenever you want to use the dyson in the 'normal way'. This simple trigger lock can be placed above the trigger and is not really in your way when not needed. Simply add a rubber ring of matching length to wrap around the handle...