Climbing in is easy, getting out is hard
I reckon Zondra is fit (without a shadow of doubt) and agile enough to get inside the beastie... But some of the control modulator system is certainly not human friendly... The Dalek shell (or Kaled shell) casing is mostly direct thought operated, and is direct-connected to brain waves and thought patterns... So, as you say Xenon, who knows what might happen in this case?!? It might be OK...
If Zondra gets in the Dalek I have a bridge in Brooklyn I’d like to sell her. Gives new meaning to dumb blonde!
I reckon Zondra is motivated by a number of life goal directives... She knows she can tap Davros for the odd few squillion every now and then, but that this will one day need re-addressing due to 'issues' she is aware (she's quite clever but masks this deliberately) the 'megalomaniac' is pursuing on his own personal agenda - even though she is unaware of precisely what these issues are. I do think that Davros kinda has a fascination with Zondra too - but that he is unsure as to what to do with this fascination - or what to do to or with Zondra the Director of the SHADO Org... Blooming complicated stuff this!!!
A Dalek of her own to drive!