Kombi going to stuff up my P's test?

[Werd.]

So I had a lesson with an instructor today, all good apparently, and I'm ready to pass more or less.. One thing however, the car I will be doing the test in is a 1969 Kombi.

The gearbox layout is 1-2-3-4 with reverse being under second (Push down the stick, move bottom left). Now I've tested a VW beetle at a dealership and the gearbox was obviously the same layout, however second slotted in perfectly. In the Kombi it rarely (1/10 of the time) slots into reverse properly.

I'm worried when it comes to either the 3 point turn or the reverse parallel park, I will stuff it up, grind reverse (happens when it isnt in properly) etc..

The instructor really drilled the 2 hands on the wheel at all times thing to me today, I have a habit to break there, so naturally I'm thinking holding it in reverse while backing up probably isn't the best look.

So does anyone have any tips on what to do in this situation? Thanks.