We have home game on Fridays that is a 50 dollar buy-in 1/2 NL. For the guys that come in late, they can only buy-in for HALF the big stack. I think this is more fair than letting them buy in the same amount as the big stack. On a side note, the guys that have been playing since the game started can also reload for 1/2 the big stack. So if the big stack is $150 and I'm sitting there with 40 bucks. I can buy in for $35 more chips.