Replacing timing chain set questions?

Thanks. Was good backup info confirming what I vaguely suspected. New problem (that others also seemed to encounter, but haven't told me of why or final resolve): all initial basic checks past failing shop diag as a code fault of MAF sensor (expensive wrong diag with no apologies from shop) lead me to check timing chain (stretch? Skipped Gear tooth?) And go old school. Seemed to indicate such. But, all checks and mic'ings performed to compare existing parts to new parts left me thinking the new T-set will also have slack and that's exactly what happened when I installed the new set! So now I'm really flummoxed! Poor quality of mfg. It's a Cloyes set and I understood they're reputable.