After closing out the PBA Commissioner's Cup eliminations with six straight wins, Rain or Shine coach Yeng Guiao will be spending the next few days trying to whip his Elasto Painters to their best possible shape for a mammoth task in the quarterfinals. "I think that we still have so much to improve in terms of the execution of our offense and defense," Guiao said after Rain or Shine carved out a narrow 112-111 win over the lowly Converge FiberXers which also served as a warmup for its quarterfinal series against either Phoenix or San Miguel Beer---teams the Painters would need to beat two straight times to advance. The Painters came into the contest assured of being the seventh...Keep on reading: PBA: Guiao feels Rain or Shine escape would serve well in playoffs