That bottom joint looks a bit dodgy, can't tell much about the other 2.

Yeah, the other two are much better. In my defence I did all those joints (including pre-tinning the wires and leads) in 90 seconds or so, as ever I was in a hurry to see if it worked...

I need to get something to hold the leads and wires together when I do it properly as I only have two hands.

Doesn't sound like your application has a need for 1 second response times though.

Indeed my script for MTRG will only be taking a reading every five minutes.