Squish band for 177 polinni

did the solder trick today and i make it about 45 thou.what do you think,good or bad?tried the octain booster as well has made a bit of a diff but not much.i thought it was pinking so after all this today removed the head to inspect,only a couple of detonation marks on the head,nothing on the piston.but did notice a bit of play up and down ie inlet to out let if you no what i mean no movement side to side.do you think the pinkin type sound is piston slap?as mentioned before,the rattle low down i think is defo the piston but it really sounds like pinkin over 50mph,any ideas.did the first seize do this,will i bin it,get a new polinni ,or go for a mallosi,