does the 50 dollars extra that the helix cost really make a difference? is the ranco proportional of on/off i cant find anything that says.. i need to know soon. im bout to make the purchase and dont know if i should get the helix. do any kinds of stores carry these by any chance cuz i dont wanna have to depend on shipping. my snakes are gonna be here my next wednesday and my heated side is above 100 but warm side is 81 so i need it. HELP
Thanks