Hello, I'm in southern California and have a well established decades old Meyer lemon tree long overdue for reshaping. I'd like to prune off all the branches less than an inch (25mm) in diameter which would also pretty much remove all its current leaves and lemons. I've heard major pruning should be done in the late fall or winter and it's already the beginning of spring here. Is it too late to do such a drastic pruning? One concern I have is the hot summer sun damaging the tree's ability to rebound. Thanks for any help.