without any plastic modifications:
A D-VHS deck can record in Data mode, S-VHS mode, VHS mode.
it can record in data mode onto D-VHS, S-VHS tapes (push the override D-VHS button)
-playback in D-VHS decks, that supports the correct data mode speed
(some D-VHS decks cannot properly playback D-VHS mode on S-VHS tapes)
it can record in S-VHS mode onto D-VHS tapes, and S-VHS tapes
-playback in D-VHS decks, S-VHS decks and VHS decks that supports S-VHS playback with the proper speed.
it can record in VHS mode onto D-VHS tapes, S-VHS tapes and VHS tapes
-playback in D-VHS decks, S-VHS decks, and VHS decks that supports the proper speed.
A S-VHS deck can record in S-VHS mode, VHS mode.
it can record in S-VHS mode onto S-VHS tapes and VHS tapes (with ET mode decks)
-playback in D-VHS, S-VHS decks and VHS decks that supports S-VHS playback.
(some S-VHS and VHS decks cannot properly playback S-VHS ET)
it can record in VHS mode onto S-VHS tapes, and VHS tapes
-playback in D-VHS decks, S-VHS decks, VHS decks that supports the proper speed.
A VHS deck records in VHS mode.
It can record on D-VHS, S-VHS and VHS tapes
-playback in D-VHS decks, S-VHS decks, VHS decks that supports the proper speed.
some D-VHS, S-VHS and VHS decks can only playback in certain speeds.
There are D-VHS decks that cannot playback HS speed.
There are S-VHS and VHS decks that can only playback SP speed.
There are some decks that have a hard time playing back LP speed.