Tiger
3.5 hours still sounds a little on the low side but i didn't know that you were doing it in a Tiger Moth. If it has no flaps then then 3.5 might be ok but I can't comment as I have no experince flying them.
Sorry if I ranted a bit ealier but as an instructor it is very disheartning when you see other so called professionals extracting the urine with other peoples money and more importantly lives with poor training.
You will never forget your first solo and as I tell all my students dont rush it will happen when it happens.