Kind of Rich. To be honest it's too much of a beast for airshows and I planned to use my 120-400 but because it went tits I had to do all Sunday with the 50-500 and on Monday I also used my 60-250.
Fortunately the 120-400 is covered by a recall from last year so once I get it in the post it should be back, fixed, in a week or so.