May be Off Topic for the Pros but not for us amateurs... If you sometimes use Dead Bug, Kludge or Manhattan style construction=20 styles you may find this bit of interest: http://www.instructables.com/id/Advanced-Soldering-Fast-and-Easy-Soldering-= of-Sur/ I have used of aluminum foil as a heat shield before but not on that=20 small scale. I am not familiar with the mounting putty, but I am going to give it a=20 try. I expect heat problems. I recall a Japanese site that use a lump of clay as a work holder for=20 circuit boards but that was a long time back and I have not been=20 successful in find the site again. I suppose that the clay is the sort=20 that is used for ceramics. Any comments? --=20 John Ferrell W8CCW "For evil to flourish, all that is needed is for good people to do nothing.= " /Edmund Burke/ --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .