You should make up a few lighter ballast slug of the same weight. Say two 3 oz slugs. When you want more you just add the two lighter ones both front and back. That adds another 6 oz. If you have another set of 6 oz slugs for front and back that add another 6 oz. So you can add 6, 12, or 18 oz. Max you could add and still stay at the same CG would be one 10 oz in the center and two 6 oz front and back. That's 22 oz. HOW MUCH BALLAST DO YOU WANT TO ADD!!!! I don't know anybody flying a Mantis that adds that much to get penetration. Don't think that much is needed. But then that is here on the East Coast. Winds usually stay under 20 or so. I think I heard Phil Barnes say he doesn't add more than about 12oz in most condition. Marta Zavala wrote: > > Have a Mantis ballast question. It was super windy at the Spring > Fling in Sacramento this weekend. After about the second round > yesterday I was doomed > as it got so windy I could not make it out far enough to "slope" the > tree line. I opted not to fly the second day due to lack of > penetration. The way the Mantis ballast is set up, three holes, one > 10oz slug over cg, one 10oz slug > in front of cg and one 6oz slug behind cg, I dont see how one can use > more than > the one 10oz slug over the cg. Adding the other slugs seems like it > would take some major rebalancing before flying. Sure could have used > more than the one 10oz slug yesterday, have any of you used the entire > balance capability(roughly 24-26 oz??) and if so could you please tell > me how it worked out- did you have to > rebalance plane- seems to me you would have to add a bunch of weight > in tail with fully ballasted plane. Thanks, Walter RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]