A few years back I suggested to Barry Gibson of Burns UK that he should market a pedal which would emulate the tone sweep of a DeArmond 610 pedal but at a more affordable price.
After a few goes, this became the Burns Shad O Tone pedal.
On one of the Burns groups on Facebook there is an animated discussion about these, some folks saying they don't work and are best avoided... But I thought they were OK.
I demoed one playing live at St Neots Club with Stephen Swann - sorely missed - on rhythm, Iain Purdon on Bass, and Ron Innes on drums. The recording was done on the spur of the moment on a hand held device and is not od studio quality... What do you think?