Hi, I'm struggling to get my reprap working the heated bed is sticking I've doubled checked my measurements they seem right but as soon as I tighten the bolts to the aluminium plate it becomes very sticky and difficult to move I assume it has to move freely. Any suggestions the quality of my printed is very poor I've had to glue at least 1 piece back together already. I bought my reprap from nexby Hydroponics developer - Reprappers