I am planning on using stainless steel thumbscrews with 22mm mdf sandwiched between them. Countering the tops of thumbscrews to locate spikes (which will be changed from photo version Stand offs for legs. I already have glass. Should cost me about £200 and a nice lockdowwn project to replace the lack of gigs!
And should be technically close to the Naim Fraim, while taking advantage of a sufficient gradient of sound velocity between materials (MDF, steel, brass, silicon nitride, glass)
Dimension A is not fixed, to be accurate you would need to be certain the glass was absolutely centred, which on my Fraim it almost never is. It might be better to work with the width of the glass shelf and distance between the centre lines of the cup & ball on each side.
It may be my natural caution but I’m always a tad circumspect with the 4-point designs given the weight of the kit - albeit, I suspect there is an argument for 4 points to spread the load of something like a 500 head unit.
The FRAIM cups are not just simple cups. Their base is hollow, making them rest only on the rim, and the “hole” is triangular, making the balls touch only on three points (making the assembly isostatic).
Should you ever visit the Naim factory and speak to Jason, or indeed Richard, you’ll hear of the hundreds of hours of research that went into designing the Fraim, including the choice of materials to get the best balance of performance. Of course, it’s perfectly possible to knock something up in the shed, but it seems an odd thing to do when the cost is clearly not an issue. But maybe you know better than Naim. It’s always possible.
Are you talking about the size of Fraim, or needing the glass front to keep kids and pets away? To me it looks like you could fit two stacks of Fraim between your Magico’s.