It is not made by 220 kart shop anymore, it is made by another company that i believe bought that line of prep, Performance or Perfection or something like that. It is a great prep. The LS1 can be used trackside, yes, but i would not use it on a tacky track, use the LS3 on a tacky track then switch to the LS2 as the track dries out and gains bite. Only use the LS1 on a good high bite racetrack, thats what it is made for. I use the LS3 anytime the track is wet, and use a mix of LS2/LS3 50/50 when the track has moisture or is cold, and use LS2 when the track is dry and has a little bite, i only use the LS1 when the track gets rubbered up and makes good bite. That should work good for you if you folllow it. I wouldnt mix any of these preps with acrysol, there really is no need. You can mix any of the preps with each other for different effects or different conditions. LS1/LS2 50/50 works great for a day race on a dusty track too. Any of the Liquid Speed preps can be used trackside if you have a few minutes between races to let it dry, the LS1, LS2, and LS3 all take 3 mins or less to dry on a good warm day, i dont know about the LS4 since i never needed it, i just stick with the 1, 2 and 3