"Replacement Cube" - a three dimensional crossword

The usual directions "Across" and "Down" operate within the individual pieces of grid. The "Through" direction jumps from a spot in one grid to the corresponding spot in the next grid down.

This document has been adjusted so that it should print out OK on one A4 sheet, although you may have to cut back your top & bottom margins (or shrink the font-size even further) to squeeze it on. To give you more chance, these introductory paragraphs are omitted from the print-version.
 

1.  2. 3.  4.
  g g   g  
5.  6.   g 7.
8. g 9. 10.   
  g   g g  
11.   12.  13.
  g   g g  
g g g g g g
g g   g g  
  g g   g g
g g g g g g
  g g   g  
14. g 15. 16.   
  g   g g g
17.   18. g 19.
  g 20.   21.
g g g   g  
22.  23.   g  
24.   25. g 26.
g g g   g  
27. g 28.    
29.     g  
  g   g g g
  g 30.    
  g g   g  
g g g g g g
  g g   g g
g g   g g  
g g g g g g
  g   g g  
31.  32.   33.
  g   g g  
  g 34. 35.   
36.     g  
  g g   g  
37.      

All answers are length 4 unless otherwise indicated.

ACROSS

1. 3D replacement (6)

5. Please arrange seat

9. Wild loos in cold spot

11. 3D measure chief (6)

15. Spring right for crane

17. Foundation of beer

20. May perhaps lose heart, drawn to flame

22. Air on headless tool

24. Stimulate without former quote

28. Experts at description we hear

29. Country arranged weather

30. Dock kittens' reward, right?

31. Posted about ruler (6)

34. 3D shape arranged a single time

36. Docked and disemboweled kitten with flying toy

37. Strange red ant carried on (6)

DOWN

1. Gentle sound of Duff (6)

3. Ugly side of Black Friday, perhaps

4. Swamps full of oldish uneven characters (6)

6. Grave to Doctor

14. Returning as an agency? (1.1.1.1.)

15. Bulk postings of returned charts

18. The advantage of heartless Boston

19. Stylish church with nice central section

25. Work for organ grinder's heart

26. Ameliorate late release

27. Vital point mentioned in fake ruck scene

28. The oldest management profession?

31. More sinister US lawman meeting with sozzled Kerr (6)

32. Like JFK, host bamboozled

33. The fancy club, with consistent subject (6)

35. Tidy initial bet arranged

THROUGH

1. Gone off; went off with some police (6)

2. Stole off without note, location unknown

4. Without Huntingdale's leader out, "Fore!" shouts T Woods (6)

6. Hairy split is back ... sand on course

7. Killers in water course ruined with loss of core dues

8. Move, at severe rate?

10. Shortly cetera?

11. Panacea in Felix Iritatis! (6)

12. Vino in Prefix Universalis!

13. Holy pouch with colour (6)

16. Sound look

17. Evidence of damage in sample of French snails

18. Husky brutish leader administered ...

20. ... sweet mountain sorrounding. In ...

21. ... a position of control, he lynched Mayan leaders.

23. No writer is honest