I absolutly hate gassless. it's horrible to use and expensive
gas with CO2 is cheep, std A18 wire is cheep and a pub cylinder will last you ages tho welding with argon mix is much much much nicer. also with gas the ark is more stabel and you can get it to run cooler than with gasless. also with gasless it leaves flux ont he weld and fumes lots compared to gas.
whatever you do don't use those littel gay 1 ltr cyls of argon they are only filled to 60 bar and a waste of money and only good for 6-10 mins or torch time ( a 10 ltr bottel full of liquid co2 is cheeper as well )
think i have 90 A gas/gasless clarke kicking about somewhere that i don't use