Not yet, but I intend to try one now!

My daughter got her burger back :-)

Despite working so well, the gaffer tape and plastic burger bun solution just looked a bit naff, so I spent the money for a proper diffuser and got a Tayden one (http://www.lean-business.co.uk/eshop/tayden-sonic-diffuser-for-12-guitar-speakers-p-508.html) as no-one seems to sell the Weber in the UK.

Jeez.... What a pain to fit it.

Not a problem with the diffuser, just that there's so little space in the back of the DT25.

I ended up having to remove the valves and unbolt the transfomer to get enough room to get the diffuser under the speaker and all the time because of the speaker magnet it was trying to attach itself to anything metal.

Getting the transformer back on was a pain because the nuts inside the actual encased amp part are not captive, so you have to open up the amp casing and again there's not a lot of room in there. There were a few other odds and sods of pain too boring to detail and I must have struggled for an hour and a half to get it all sorted and back together again.

Looks and sounds great now, but wow, a lot of effort....