I'm re-working some circuit boards, and need to replace the xtal/oscillator driving a PIC. I'm fairly good with soldering, but I've never done SMD. These are six pad devices, they connect to Vss, CLKIN and CLKOUT. I suppose it's possible to cut the traces, and feed CLKIN from an externally mounted device, but there are some reasons I'd rather not do that.
What advice can you give me for the removal/replacement of these guys? Special tools? Techniques for getting them off the board? I have one or two boards I could sacrifice for destructive testing, but would like to avoid that if I could. To complicate matters, one of these boards is dipped in plastic (for weather proofing, I suppose) - it's a real bitch to work on.
Any suggestions or help would be greatly appreciated.