Hey, got a pedulla t-bolt that the prev owner installed big singles. I hate the pre in there and am replacing it. Narrowed the choices to. 1 sadowsky with vintage tone 2 nordie 3 band 3 acg east pre filter with tone. I have 4 knobs. Any thoughts, experiences clips esp would be appreciated. In particular with the acg filter pre, if anyone has clips of that it would help Lastly, since when I install these pre's, I will have a switch that is not used. I was going to install a series parallel switch. Anyone done this with big singles? Thanks!