When I say anything remotely unfavorable to them, I hear "click".

I don't waste any time doing that.  If I don't get a "click" I give them one.
I also seem to be missing out on the " Large-Breasted Mattress Thrashers".  How come I don't get them?
Ken

Five Molicel P-30Bs should do the trick. I switched from 6-cell LiPo 2800 mA-hr batteries to 6-cell P-30Bs with no problem. I do have some space between cells for cooling.

Let me guess, you have printed separators.....  Does it help?  I am finally recognizing that everything I knew about IC is just taking up space in an aver shrinking memory bank.  Battery cooling is a real art form and a lot of our planes really don't do it very well, especially conversions.    Anybody that can feel 1 gram of tip weight in wind has to have a better battery box.  Pictures?  or not.

Ken

Does capacity change when going from Li-po to Li-on?

If I'm currently using a 5 cell 2800 Li-po 25c, would I use the same in a li-on pack?

They are pretty close to the same.  Two differences I have noticed, and they are somewhat related.  First the Li-Ion will allow you to practically run it down to zero capacity and not damage the battery.  On Lipo I tried to keep my reserve around 20% depending on the wind.  On Li-Ion I go down to about 3% with no problems.  The other is that Li-Ion are not as even over the run as Lipo.  They will start to "sag" some (about .1 Lap time) towards the end.  The timer will keep that under control but I have found that the boost is not as fast starting after the hourglass.  You can also set your low voltage cutoff to 2.8 vs 3.0, in fact you should.  AND...the weigh less.

Ken

And when a CL stunter goes straight in it is called a lawn dart, regardless if the prop is rotating or not.

Five Molicel P-30Bs should do the trick. I switched from 6-cell LiPo 2800 mA-hr batteries to 6-cell P-30Bs with no problem. I do have some space between cells for cooling.