Thanks!. I have been brewing for over 40 years and up until I built this system my small scale brewing has been on my traditional keggle style rig with no heat under the MLT. The terminology has grown, changed and morphed in so many ways. I just wanted to be as acurate as I could be, so I figured feedback from peers who's minds have not been warped by ole school barn oil drum brewing like mine has been. So, "infusion" is operative word. I agree that infusion refers to adding something, so, since on this rig (mostly due to habit) I usually fill the HLT to heat the strike water then pump a measured amount to MLT for dough-in, so then it can be called a RIMS. However, I also have the option of heating the stike water in the MLT before dough in where it then morphs into a DFRMS. I would like to mention that I have a foundation below my false bottom screen of 4 gal so the grain does not set on the MLT bottom. Of course fines do leak through but are picked up by the pump and filtered back through the mash fairly quickly. I may not added the heat exchanger coil to the HLT until I experience scorching since I hate cutting holes more holes in my tuns. Thanks to everyone that replied. Cheers!