Hi im a member of the xtreme systems forums and build phase change units for cooling pcs im trying to aquire some care 45 but boc say i need to do some training in order to handle it and buy it but being busy i dont have much time and therfor am unable to complet the training is there anyone who has completed the training who can buy some care 45 for me as im currently stuck using r290 as a refrigerant if so you will be paid in full before and will be paid for your trouble cheers matt. please contact me at pocketbikeuk@hotmail.com