I'll probably be ordering the speedbuild kit either later this week or next week. We shall see how the paychecks fall.
Many clubs in the UK operate specific and measured decibel noise limits. A club can face closure for causing a noise disturbance to nearby by residents. Some engines suffer more than others from the effects of exhaust back pressure.
A few clubs in the UK that have infuriatingly annoying NIMBY neighbors are not going to make an entire industry change its policies. What does make companies change policies is legislation, and far as I can tell there is no noise or emission regulation applicable to model aircraft engines. They are allowed to be as loud and smokey as desired.
Also worth noting that the Fox engine in the OP of this thread isn't any louder than any of my other two cycles. Oh, and if you ever want your weed whacker to live longer than one season before the top end melts, grab a walbro carb for a DLE 30 and bolt that on. The EPA carb previously fitted to the strimmer is set to lean-burn it like crazy and the EPA rules require proprietary fixings on the mixture needles so the average joe can't adjust the thing; the carb for the DLE30 does not have to meet these regulations and is easily user adjustable. Bolt that carb on, fatten 'er up, and she'll last 10x as long.
As an aside, people who complain about things like that make my blood boil like nothing else. I have zero respect for anyone who thinks they have the authority to tell someone else what they can and cannot do on their own property with their own property. Way I see it, as long as the people next door aren't putting me at direct risk of harm, I don't give a flying -beep- what they do or what hour they do it at. They want to have a machine gun shoot in their back yard at 3AM on a monday morning? 'Long as they're doing it safely I'm more than happy to let 'em have their fun. They want to blast heavy metal all day? Sure, hell crank it up more I'll rock out to it too. They want to run control line 60-size planes with no mufflers? Hell yeah, I don't fly CL myself but I can appreciate the engines! They want to decorate their lawn with junky cars? I think it's in poor taste to let perfectly good old classics go to rot on cinder blocks, but to each their own I say. It's not my property so, as long as it's not damaging my property or putting me at mortal risk, I have no authority to tell them what they can or cannot do on it.