RTFM
The flight manual, and pilots manual, gives guidance, but most private pilots, (myself included in an earlier life), have all overloaded singles, without even thinking about it.
In later life and a ATP behind me, I realised just how stupid some or even all of my private flying escapades were. I do not intend to go into to many details.
I have limited experience on type, but have an association with a group 140.
The standing instruction is no take off without LOAD SHEET.
Basically fuel to tabs, 2 on board only, suitable runway, and WAT considerations. (even if not perf A.)
Just what was the density altitude at Sandown. ?
How long was the grass. ?
How much fuel, and payload. ?
All of these will be in the official report.
I had a great procedure for SF take off, full power until brakes unable to hold, then light pressure to reduce nose wheel contact, then at 75% of rotate speed, rapidly appy TO flap, the airtcraft went into hover mode, and after a slight pitch down, accelerated away.
I am still alive to tell the tale, but my instructor almos hung me out to sry, when I tried to advise a new guy how to operate. Bush pilots are &&&&&&& all he would say.
Take care guys. RTFM.
glf