I reckon it's just a case of tuning the reel and getting used to it. I had similar problem when a recently bought a new reel after using a 7HT for years. I tuned it the same as my 7HT and it just didn't work. I put some 3 in 1 oil in, put the 2 brake blocks back in, and put some 30lb line on, filling the spool to about 3mm from full. It now casts superbly.