Greg - I don't see what the advantages of aluminum tape would be over Kapton tape for attaching TCs. Neither provides firm (non-lifting) attachment as evidenced by the noice one sees when the profile is plotted out. You really do not know what you are "probing" but it likely is not a good representation of the solder joint. High temp solder is best, conductive epoxy a good substitute. If you absolutely cannot sacrifice a board to the "profile gods", I suggest the use of the TempProbes from Saunders. Not as good as the solder or epoxy, but a close second and far better than using tape. Phil Zarrow ITM, Inc. Durham, NH www.ITM-SMT.com ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################