The pyro duck (and the other "doodling stuff") looks great to my inexperienced eyes Phill. Great start for a "running toddler"!
I don't want to sound unduly critical (honest), but I'm surprised at your comment (and several other comments I've read) about UK plugs (or the lack thereof). Because Swiss plugs are different, it's my standard practice here to just cut off the plug (even if moulded on) on any appliance (household or shop) that does NOT have either, A) a 2-pin plug/twin core cable, OR; B) a three core cable that did not come from Switzerland.
Multi adaptors are all very well (UK/German/Swiss, etc, etc) and some of them do work "OK-ish", but it's the work of just five minutes to fit a "proper" plug for your own country, costs only "a few bob", and in the case of UK, ensures that you do have a fused plug on the appliance, which is exactly what the UK ring main circuit system was designed for I understand.
As said, my standard practice is to just cut all the "wrong" moulded-on plugs off and replace them with the "right" ones, as each new appliance arrives in the house/shop.
A few years back we moved from Singapore (UK plugs generally, + a few US type) to Germany (the non-standard "Euro standard"), to Switzerland (own "standard"), all within the space of less than 18 months. Guess how many plugs got cut off and replaced, how many times? And all the leads are still long enough now!
Just saying - and just POSSIBLY a reason why that pyro controller gets hot???? Some of those "multi adaptors" are very poor electrically IMO.
Sorry. "Lecture" over.
AES