Hi there
The most important thing to realise at this age is that sleep training takes time, it isn't something that happens overnight with any baby of any age, so try not to worry if you are needed to shush/pat sooth and resettle your LO, he is still very young.
I think your A time looks a little short, here's a link to guidance times for ages
http://babywhispererforums.com/index.php?topic=64158.0You'll see at 2 months 1hr 15min to 1hr 20min is the guidance. Always allow for your LO to be an individual when looking at things like A times though. So, Your first A looks like 1hr 10 (if I am reading correctly, I added the 10 min E to the 60 min A) which is not far off the guidance time, but keeping him awake just a little longer might get you a longer nap. It also sounds as though he might be tirying to tell you he is not ready for a nap by fussing and protesting when you shut the blinds. he knows what is coming and doesn't want it yet. I would increase the A to 1hr 15 for a couple of days and then 1hr 20 and stick there for at least 3 days. Then let us know if the naps lengthen.
LOs learn to sleep at night before they learn to sleep well in the day so it is perfectly normal for him to need some more help in the day and resettle quickly and easily after a night feed. At nap time when he fusses it's ok to shush/pat in the cot, even ok to shush/pat in your arms all the way to sleep at this very young age (and then put down in the cot and continue to shush/pat to re-settle in the new position on the mattress). Learning to sleep in the cot and independently is a life long skill and takes some time to learn. If the fussing is low level, a mantra cry then it's ok to wait the 5 mins, if it is a cry then you should return immediately to your DS, he needs to know that you will always come when he needs you, this will increase his confidence and independence.
I would also suggest going in sooner. If 45 min naps are now the norm go in at 35 mins and position yourself to shush/pat immediately he stirs, you can even begin before he stirs, and continue to do it right through the transition and into the next sleep cycle. There is no harm at all in continuing to do it until DS in in a deep sleep, this won't ultimately cause a problem as he is still very young and you are still in the early days of training. This is teaching him that it is ok to transition and he is safe and soothed. If you fear causing a prop habit here, don't, this sort of prop dependency is easily weaned gently over a short period of time. If you can keep all that soothing in the cot then great, if not it's ok to PU.
Sounds like you have made a great start, well done.
Do keep us posted on how things go and do ask whatever questions you need. There's lots of support here for you xx