Hi, thanks for the responses,
I can report that under A800-100c-188.8.131.5243 the Zoomer2.lua has been working for 30 Minutes without error, i stopped at that point as things were getting a bit warm.
I have now set running Ultimate Intervalometer with the same script settings that were giving issues before and so far so good. (previously i was getting a total shutdown if setting a zoom level above 0). I will leave this script running overnight to see if the original problem recurs and report back.
I read through the post that was linked above regarding Zoom Crash, and i noticed a spreadsheet which suggested that the A800 and A1300 cameras require info from tests to be submitted. If this is still the case, i have A800 and 2A1300 that i can put to test if still required.