[shevek]

Does fast arrival apply in all game force auctions? Only those with a fit, or when you are about to show a fit? Or never?
Say 1♣ = 16+

1♣ - (3♠) - X - (no)
?

Responder's double is takeout, clearly GF. Can be Thrnt, if you play that.
I'm giving opener a 1-suiter with six ♦s.

Which hands bid 4♦? Which hands bid 5♦?
Is at sensible for 5♦ to show extras, hoping responder can take a punt?

Let's say you bid 4♦ on a range of hands. What do responder's bids mean?

4♥ - offer to play with five ♥s?
4♠ - good diamond raise? Does it imply a spade control?
4NT - is this natural? (A good 3-4-1-5 or similar)
5♣ - natural I guess

[steve2005]

Your opening was artificial and you had a very high preempt.
I don't think you can afford to be as specific about hands as you are trying to be.
If club or diamond 1 suiter you have more bids available.
However, what if opener is a 2-suiter, 3-suiter, 5431 or balanced? What then?

[The_Badger]

That 3♠ pre-empt has bounced players out of the right decision many a time, but using the principle of fast arrival in this type of auction where 1♣is strong is dubious at best, in my opinion.

Fast arrival is principally used for weak hands with a known fit. Here you don't know if you have a fit, and as steve2005 rightly says, opener could have a big variety of hands for his 16+ opener, and to a lesser degree responder could have quite a selection of different hands for his GF takeout double.

[all loomis]

too hard. maybe 4d has 3 fast losers, 5d 2, and 4n for 1?

hands like this are why precision is not very popular.