Eippo1, we've got some ideas about future models, but we have to concentrate on getting this first one into production.
Bahamut, John says he's gotten it around 5" trees. I haven't found anything like that to try it on, myself. The retail cost will be not so dissimilar from the Kickstarter backer levels, but we really don't know. There's quite a way to go before there's any sort of retailing going on. For the immediate future, the only way to get ahold of a TiGr is by
backing the project.