F, you are doing great, but I would think sandi is going to come back and tell you, you are putting too much thought into everything. Relax, we don't always say the right things at the right times. Just remember to change your focus: you are co-parenting, not friends.
With regards to Skype: should you not work out a time to call, as a permanent fixture. ie. when the girls are with W you will call on Thursday, Saturday and Monday at 7pm. The W can set up the computer, get it already and that's that. If the W is on Skype as well, again be friendly, but the focus is on the girls and what the girls are doing.
Hope it helps a bit.


ME:51 W:46
M:25
S:22, S:20
Divorced 16/9/15
BD 10/12
W left 12/12 with OW, affair confirmed Nov/12.
Dark since 6/13
I"m in a new relationship since Feb 14.