FrugelHorn XL

An interesting idea Ash although I suspect bass response may be quite thin and unnatural with Meccano

Open baffle also avoids boxiness, using more conventional materials than punched steel and is quite easy to research and experiment, even using something as simple as cardboard to prototype

Varying the width of a solid baffle around a driver has a big impact on frequency response and I built various low cost prototypes before settling on the final design. However (and this is quite a big one...) this was with the luxury of digital crosssovers, a mic & software to measure the resulting changes each time until I got exactly what I wanted

The panels I got from Louis Eastman were I believe some of the first, nonetheless the cnc work is very accurate, only a couple of edges needed light trimming with sandpaper to achieve a perfect fit. The exposed half thickness edges stand a mm or so proud of the front face, which I think is good practice and they are easily sanded back to give a flush front face.
Next step is either to fit the drivers and test or complete the waxing before fitting the drivers and testing avoiding having to remove and refit them. Still, that's tomorrows decision and task.

Okay, thanks. Still going to do it though so that I can witness my mistakes first-hand. Mistakes are as educational as successes, if not more so.