Would anyone who uses NO Nails for architraves tell me how they deal with the mitres and how they stop the heads or legs falling off before the stuff sets? If the answer is nail or pin it then you might as well skip the No Nails completely - and just use nails!
OP - whilst we are talking about expenditure it has been suggested that the skirtings can be fixed with low expansion foam (as suggested by
@RandomGrinch). Having used it I find that this works well, especially on MF stud walling (which can be a bit flexible), but I do find it a tad expensive for large volume work. For the architraves I generally glue the mitres (with Mitre Mate, sets in under a minute, basic
Unika Mitre Bond £5.98 at Toolstation) and fix in place with pins. In the absence of a 16g nail gun this can be done with a basic kit comprising 16 gauge panel pins, a small awl (ideally a birdcage maker's awl, but pilot holes can be made as easily by chucking a panel pin in an electric drill as well), a rampin (
Draper RP160, £3.65 from UK Tool Centre -
£5.42 from Amazon), a hammer (16 or 20oz) and a nail set (for example a set of 3 Stanley nail sets costs £6.95 from
My Tool Shed - don't be tempted to buy cheap Chinese tat! Other reliable brands include Priory, Bahco). Assuming you already have a hammer and an awl (or drill) to start the holes that leaves you with a tool expenditure of
well under £20 on tools that will last you decades. So despite giving you the expensive path before, it isn't always necessary to spend shed loads of dosh on tools (and I'm old enough to have started work before pinners and nailers were introduced, so hand nailing
was the only way)
And BTW, even if you buy a pinner, you'll still need a hammer and at least one nail set (to fit the pin heads) in order to sink the heads below the surface, which the gun doesn't always do. I have a set of three nail sets in my tool tote for just this purpose, together with some Mitre Mate which gets used for all sorts of sundry repairs
Above: Draper rampin in use
Below: Stanley nail sets (set of 3)