I have been investigating selective wave soldering. Results to date have been less than desirable. The fixture is a huge heat sink, non-metal. The objective is to keep my SMD away from the wave while soldering a few through hole parts and eliminate my glue operation. The first fixture I tried held the CCA very high making it difficult to get successful soldering. Current machines are two super modified, nitro burning Hollis GBS Marks that have been modified with a High Mass Preheats, and modified Hot Air Knives with very flat CFM response curves. Also utilizing chip waves. I would appreciate any and all recommendations or experiences you would be willing to share. Thanks in advance. Ron From Hollis Land.