Yes the Hiverly bases.
I am finding many beetles and a few wax moth larvae desiccated in the DE powder I’m using in the trays, and less running around in the hive.
Rather than a full screen these bases have smooth plastic ‘plates’ with holes cut for the shb to go through. I find that with a full mesh screen a great deal of pollen is stripped from incoming workers, falls into the tray and is wasted. This has been markedly reduced.
The slotted top I believe is providing two benefits, the first being it provides a much smaller area for the beetles to penetrate into the brood box, so the bees can patrol much easier.
The other is the usual perceived benefits you get from a traditional slotted board in terms of ventilation and reduced draughts.
The base allows you to add or remove entrance reducers very easily, and I have mine setup with a fully open entrance with the remaining three sides setup as vents, on a warm evening I can literally feel them pushing the hot air down and out through the vents, and as the internal area of the base is vented, it provides an area for bees to hangout without bearding on the exterior.
These bases are built out of premium materials, are very strong and can be fully dismantled if required for cleaning or maintenance.
It’s also the first base I’ve used that doesn’t allow large amounts of rain to collect in the tray - stays almost completely dry.
I don’t see them as a magical solution to SHB, but rather a well though out and constructed design that integrates a lot of features better than other bases I’ve used or considered.