I didn't know about the reaming procedure the first time I changed mine (about 2 years ago). Pulling them then was easy. When I did mine again about a month ago they were hard to get out and the third refused to go back in. That is when I got on here and did some searching. I used a couple of drill bits to ream out what I could and used the shop vac to get out the carbon. I have since ordered the reamer from Diesel911 (a member on this forum). I haven't used the tool yet, but it seems of high quality. By not getting rid of the carbon build up, you shorten the life of the plugs. BTW, you can get a packet of anti-seize at any auto parts store for a little bit of nothing. Rachet end wrenches work REALLY nice on this job.

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Brad
1981 300TD - daily driver
1963 Chevy II
2001 F-250 7.3 Power Stroke