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.