yep there are many 58" extras that have a glow engine in and with great results, no videos as of yet sorry.

The ideal engine for this model (glow) is the saito 82 fourstroke, this is by far giving the best results, but I know of people using YS63's and west 50 2 stroke engines all with great results.

The glow version is identical to the electric version, only it has strengthening pieces around the firewall etc and comes with a tank.

Have a look here, the instruction manuals can also be found here for both the electric and glow version:

http://www.freestyle-rc.co.uk/_shop/...8Extra300.aspx