I placed my ("In stock") online order, as above, on 2 January: a few words of caution:
I received an immediate automated email response confirming my order: but as of today, 10 January, it is still shown as "processing" ...
Not THAT long a "delay"; but what else has also happened in the few days immediately following the order is a hacking / compromising of my card details, with two attempted uses of it for fraudulent transactions (one £0.26p "test", and a £1,300 substantive fraudulent purchase attempt). I did confirm to the card company then that the Proper Plane / Liquipay (?) transaction was genuine, and AFAIK this payment was made before the fraud problem.
My card company had already declined the above two transactions before contacting me, so I have not lost out financially: but I do have the hassle of changing the card, and notifying various companies of the new number, etc. etc.
I have absolutely no evidence that this is anything to do directly with Proper Plane: I assume that they never see my card details in handing off the payment process to Liquipay.
I have never before heard of Liquipay before: no evidence about them either ...
But the timing coincidence (and the use of the card details in Germany, when I reside in the UK ...) makes me concerned about this specific "foreign" transaction.
I keep the card (with a low credit limit, in case of occasions such as this: a total loss to me of up to the card limit would be a pain in the wallet, but not a financial disaster) almost entirely for online use, with a limited number of businesses that I use regularly, with no previous problems.
This first "off piste" use via Liquipay and the fraudulent activity are timed neatly together?
But I may of course be adding 2 + 2 and getting 5 ...
My aim isn't to put people off buying from Proper Plane, but I felt an alert was justified in the circumstances.