I used a 3 piece airlock for the first time recently on my Night Moves PA and it worked great. I hadn't cold crashed in sometime due to suckback from the blowoff jar.
This time I did cold crash as I had a big dry hop and a bit of wheat in my recipe. The airlock did suck back a little of the vodka, but it was a miniscule amount and I left the airlock in place when i bottled and I was very pleased how that went as well.
I would only go back to a blowoff jar if I maxed the fermenter capacity and expected some krausen overflow.
@Bonsai & Brew I've become a big fan of Mangrove Jack especially their M44 West Coast yeast. Fermentis has always been reliable and I can't leave out Nottingham, which has always been a great performer.
I've had pretty good luck with them but have only ever used their 1007 for my Alts. My supplier sends them with a freeze pack. I had one dud that arrived warm but the others have been fine.
I have 2 in the fridge now, both 1007 and will use one for an Alt and the other for a Wit.