Good advice, I love my italian hive tool and even though I bought several hive tools to try this is the only one I use.
Once I tried it I just gave up on the others.
Anyway, Michael if you need to seperate those frames during an inspection, to check for eggs, brood etc.
Just put the end of your hive tool between the wooden part of 2 frames and pry apart.
If you look down in between the combs and can see that they built comb outwards off of one comb attaching it to another just slide the blunt end of the tool down to seperate the comb before you pry the frames apart or you can rip a section of comb off a frame.
I have also used the hook end to do this, I slide that down and pull it upwards under the bridge comb and it seperates it and you get the piece of comb out instead of it falling to the bottom of the hive.
Don't be afraid to take the frames apart to inspect, it will help you catch things you may otherwise miss.
I inspect my hives once a week after installing them in the hives but once they have the hang of things I try to be less invasive and do a quick check without disturbing them too much.
I will pull out frames until I see eggs and brood though, once I find at least one frame of them I stop pulling frames. Sometimes I see them on the first frame I pull and then I just peek down to see if they have enough space or if I need to add a box.
If something doesn't seem right then I will keep looking around.
You want to at least make sure the hive is queen right before it gets out of control.
Its good to also keep an eye out for queen cells, swarm cells etc. then you can do a split to avoid a swarm.
Do whatever you are comfortable with, if you feel the need to inspect more because it will put you at ease then by all means do that.
I found that in the beginning I needed to know what was going on all the time because I was afraid I would miss a sign and screw up the hive so it was hard for me to stay out of the hives, I still only went in them once a week but it drove me crazy wondering what they were up to, but after they filled out an entire brood box and got going on the second one just fine I relaxed alot and let them do their thing.
This is suppose to be fun for you so do what makes you happy.
The italian hive tool if you are interested.
http://www.brushymountainbeefarm.com/Italian-Hive-Tool/productinfo/591/