Yo Matt, hope the following helps:
Tools needed- hex key, red spanner(Park tool spa-2), rubber mallet
1. Remove the round lockring using the spanner, however do not try and remove the hex bolt first or you'll damage the crank
2. Once the lockring is removed you can unscrew the main bolt using the hex key, then pull the non-drive side crank out with the washer
3. If you're using the Mega-Exo bb use a rubber mallet to tap the axle and drive side crank out
This should take 5 maybe 10minutes but, just so you know, SLKs are notorious to work on so you're not alone with your dilemma.
KRhea