I'm not at all familiar with other devices other than the KR808's. Many of these carts will work on the IGO. I found they work better on the 1300 though. Some people have indicated the kr808 carts from V4L don't work, for me it's been a hit and miss with them! I've never tried filling with a syringe, in the beginning I would do it by drops...now I just squeeze a little in at a time until I get a drop out of the bottom. I also top mine off a few times a day. I only have just a few juices I vape now, unless someone has suggested something out of this world! lol Good Luck...keep us posted!
And you guys are using the cartos that came with it, right? I think I'm going to use a syringe. Any suggestions for if you want a smaller carto to sample flavors? Are there any tricks/tips to filling these things? I asked Bill what ohm the carto is, but he didn't know. I looked on another website and I think they said 2.6-2.8 or maybe it was 2.8-3.0. That sounds like the right ohms. I ordered some Boge LR 2.0 smaller cartos. I hope they work! Mine should be here today or Monday.