Actually I'm using electronic solder, so, no worries there... but I'm afraid I may have put too much on one of the larger surfaces and it may have flowed into the block instead of squishing out.
I will see today when I de-solder it. I'll just put it back in the oven and when it's hot enough I'll take the blocks off and make sure.
I'll then wipe off the extra solder with a wet paper towel, brush on some rosen flux and then put them back in the oven and flow some solder around the edges.
Again, it's just me being paranoid. And remember, "When the world is out to get you, paranoia just makes good sense."