Tinker or Leave it Alone?

[latenight71]

10 Man 5x5, Currently in first place by 13 pts
Where I stand category Wise
RS - 1st (Lead by 50), HR - 1st (Lead by 7), RBI - 1st (Lead by 32),
SB - 4th (Target 1st Behind by 4), Avg - 2nd (Target 1st behind by .004) W - 2nd (Target 1st 7 Behind), S- 5th (Target 3rd Behind by 13), ERA - 4th(Target 2nd by .004), WHIP - 4th (Target 1st behind .06)

Batters
C - Grandal
1B - F Freeman
2B - J Kipnis
3b - C Davis
SS - M Scutaro
CI - B Moss
MI - T Plouffe
O- C Gonzalez
O - J Willingham
O - S Choo
O - M Bourn
O - J Hamilton
U - D Ortiz
Bench - E Hosmer (dog)
DL - T Tulowitzki

Starters
C Capuano
Y Gallardo
J Cueto
J Beckett
C Sabathia (injured)
C Lewis (injured)
T Lilly (injured)

Closers
A Champan
S Casilla
H Street
C Kimbrel

I'm considering trading some pop and Capuano for a more reliable starter and closer
6 Weeks ago I traded for C Kimbrel, S Casilla (who I'm now worried about)

Any advice? Should I stand pat and see where I am 4 weeks from now (at the deadline)?? Thanks in advance