i'm using the blade in this way from july and i haven't problems for the moment.
i guess you can turn it but i've never tried it, i only adjust the tension on the blade for not touching the back and slowly cut the wood.
this isn't a bandsaw, it's a lot more slow, especially when you're trying to cut 3cm of hard wood, but you can make more precise cut and curves with it.
i hope i've been helpful
I used a piece of 3mm polycarbonate to make an insert for my scroll saw. The one it came with had a huge slot like yours and it lets thin material flex too much. Not a problem with wood...but I cut a lot of bendy materials. Not hard to make an insert...just use the OEM one for a pattern (can cut it out on the scroll saw ). I like the blade to run right in a small channel.