re: Poker & Joining tourneys at the very last second
I always late reg into MTTs.
Like you, I'm comfortable play a short stack and playing a really aggressive shove/fold style off play. This is usually if it's a freeze out.
If it's an re-buy/add-on, I usually just late register, sit-out, then take the add-on soon after.
As far as final tabling MTTs, I've made a lot of final tables and took down about 10 wins playing on carbon. Wont lie, there is a lot of luck evolved when you're open jamming 10-15 BBs from the start, but if you double up, the rest is played like you would a normal 20-30 BB stack. A lot of luck is always required in MTTs, but so is skill.