I have an Evo .46 and an OS .65LA and I have used an OS 1.20.

Both brands are great, but I would never use a Super Tigre again. Too many issues with even getting the engine to run. OS and Evo, flip it and go. I pulled an OS .46 LA at work, hadn't been run for two years, took a little longer to start, but she still started just fine.

I am a fan of either maker, I would for sure buy from them again.