It is probably too late for the test, but I have to ask, what diameter of wire are you using? Even for 0.045" you are set very low. E71T-1's are not designed to be run at 180 IPM and 23.5 Volts on 100% CO2. IMHO, for 0.045 you should be at a minimum of 220 IPM and 26-27 Volts with CO2. Even for overheads and verts, these settings are a minimum. If the wire is Excel arc, you should find it to smooth out a little with the higher settings. You also will have a better chance in avoiding lack of fusion and slag inclusion with the increased arc energy. If the diameter is 0.035, you are probably okay. However, I am not sure that excel arc 71 is offered in 0.035.
Zeke
I have been known to clamp a rod or bar to the test plate just to the edge of the groove. This gives me an edge that can be seen easily while I'm welding. Move the bar to the opposite edge when you are making that pass. Make sure the guide bar is not too close to the groove and what ever you do, don't weld the bar to the test plate as you pass by it.
Good luck - Al