Velleman K1803 Universal Mono Preamplifier Kit

Perhaps someone has already attempted this:
I’m interested to condensing this design layout.
Kit’s PCB won’t fit inside my vintage mic’s housing.
5/8"W x 1.5"L x 5/8"D or 1.5cm x 4.0cm x 1.5cm
I’d like to ‘dead-bug’ solder the parts so they will fit.
In other words, solder the parts directly to each other.
Mic’s housing is all metal so it’ll provided a good shield.
But will this circuit work when parts are directly soldered?

If they are correctly soldered it should work.

If you take care this will work well . This method is used to get extra performance in some designs . One advantage in the general case is decoupling capacitors for chips ( usually ceramic ) can be soldered very close to the chip . This is considered very good practice . In fact for digital devices preferred . Sometimes a machine soldered digital circuit will have hand soldered capacitors from 0 V to lets say 5 V soldered Dead Bug style to the back of the chip . An oscilloscope connected to this point will often show considerable reduction in noise if so , 5 mm away already a problem .