What type of soap do you guys use to mix with the hot water? Also I bought pillow tick, how do you cut it to make the right size. Can you count the lines in it to figure it out? Also looking at pictures online I see that some of the Renegades have the RENEGADE stamped on the barrel by the .54 cal. I don't have that stamp, but everything else is the same. The serial number doesnt have a K so I don't think its a kit gun. Was this one of the earlier models?