Recently, I have flown formation with a gaggle of aircraft (non-Lancair) that have some differences in performance.   I would like to hear from Lancair Legacy pilots that have experience in formation flying.   Specifically, what are your opinions, experiences and recommendations regarding mixed formation flying??   And the same question regarding approaches at LESS than 100 KIAS on final approach??   Especially behind another aircraft that generates a known significant wake turbulence??     There are many Legacy pilots that have experience in formation flying with similar and dissimilar aircraft types.  Please share your advice and experience.  Thank you all.