This will be a big win for me. I’m currently using Neptune dos but I am NOT a fan. I’ve been wanting to get the spectrapure litermeters for a few months but they are out of stock. I want the most reliable pumps I can get to dose my 4 part and if I can go with Tunze I think they would be an ideal replacement to the specteapure ones. If they are around $250 it would save me a ton of money too. Win win.