Carl,
There are pro's and con's to "pusher" setups. On the con side, if you have a ship that is set up for normal counter clockwise IC and convert to E power all the trim settings have to be almost reversed. For IC many build in a 1/16 -1/8" positive incidence (leading edge up) to the stab (this counteracts the downward piching moment do to circular flight with the counter clockwise rotation of the prop), we use reverse bellcrank installation (i.e. front line down). We carry more outboard wing tip weight. Some of these you can't easily change when converting. If the ship was built zero/zero then the only issue would be the reverse bellcrank which you could live with as long as the leadout position is adjustable.
On the plus side - if you build E power from the start the conversion is not to bad. For my ships I have found that I needed to be able to get the at least 1/2 the battery pack over the leading edge to hit the proper CG without adding tail weight, not to hard in the build stage. Also if you are going to go pusher prop you can use the old standard bellcrank installation with the front line "UP", this makes the control installation a little simpler. The stab should be at zero to 1/16" negative incident (to counter act the upward pitching moment due to circular flight path and the clockwise prop rotation). You will likely need a little less tip weight but this is minimal.
During flight what you normally notice is on take-off it holds the nose down a little more with the "pusher prop" then the standard rotation. You will likely feel more tension on the outside maneuvers (a little more solid feel) particularly the corners and last outside loop of the clover. I have two ships that are running pushers and for me it made them feel better.
Best, DennisT