Just let us know what You need....

It uses PSR 11 39 TME cells which are smaller PSR 11 39 MD3/MHD cells, so R22D fully compatible

The PSR 11 30 MDSX can also be used, they just have 2 pin Molex connectors, rest is the same

So the full power of these cells in a size of a K1 sensor

Use the small "triangle star" to fix and hold the small sensors.

Fix them with a rubber band, or tape or.....

And yes, the house has enough through flow when 3 cells are installed

And NO, it will not fit into original Dolphin shell, sorry not enough space. Breathing bag will be squezzed too much and scrubber won´t fit in then, sorry...but is a problem of the original Dolphin shell.....

maybe check the very special parts page ...Karls new house...