WTB Live Rock

[Black Phantom]

I've done this before with no cycle. I transfer the new live rock directly to buckets filled with salt water and then into my tank. Its only in the outside air for less then a minute.
The 45 will be filled with established water from my 250 and I already have the sand for the new tank in my sump. It's been in there for about a year. This way there won't be any die off from the new rock and therefor no cycle or ammonia spike.
The last time I did this it was with 90 lbs of rock and no problems.
As long as the new rock has been cycled already I'm assuming this should happen again.
Let me know if I'm missing something?