i do not think a trigger would work for reasons already mentioned tony, i know that i do not hold the pole in one place all the time i move it through my hands for slightly lower windows where there isnt enough space to move back. we use 10mm gas shut off valves which we have fixed to the pole. also you can adjust the flow from full flow to very low flow if needed, can you do this with a trigger or is it "on" or "off". i think i have heard of one trigger which you press to turn off, rather than on, not sure if this is any different to the valves. i would be happy to hear comments about my reservations from those that do use triggers
bill