Unofficial File parts/6138629y.dat
part image
File Header:
0 Sticker  0.8 x  2.9 w/'ONE WAY' in White Arrow on Blue Back
0 Name: 6138629y.dat
0 Author: Joel Barker [joel333]
0 !LDRAW_ORG Unofficial_Part
0 !LICENSE Redistributable under CCAL version 2.0 : see CAreadme.txt

0 BFC CERTIFY CCW

0 !KEYWORDS Ghostbusters, firehouse
0 !KEYWORDS set 75827

0 // black text
Status:
1 'hold' vote. (HN)
Size: 12230 bytes
Reviewers' certifications:
GeraldLasser=hold
Required (unofficial) subfiles:
(none)
Related (unofficial) subfiles:
(none)
File reviews and updates:
At Wed Oct 21 20:35:01 2020, the file was initially submitted.
Submitted by: joel333
At Wed Nov 4 22:15:01 2020, a new version of the file was submitted.
Submitted by: joel333
Comments:
Removed keywords that were already in description; shortened description; removed !HISTORY line

At Wed Nov 4 22:45:02 2020, the following review was posted:

Reviewer: GeraldLasser
Certification: hold
Comments:
use a CHRD instead of these:
1 15 -24 -0.25 -3.3 -1 0 0 0 1 0 0 0 -1 1-4disc.dat
1 15 -24 -0.25 3.3 0 0 -1 0 1 0 1 0 0 1-4disc.dat

on the blue side, use a NDIS
1 1 -24 -0.25 -3.3 -1 0 0 0 1 0 0 0 -1 1-4ndis.dat
1 1 -24 -0.25 3.3 0 0 -1 0 1 0 1 0 0 1-4ndis.dat

Duplicated lines 186, 187

You can skip some of the extra vertices, removing those will not create too small triangles:
-29 -0.25 0
-24.99 -0.25 0
-14.5 -0.25 -8
0 -0.25 -8
also the ones on top, you can
the ones in the middle: 0 -0.25 0
ALso on the top edge of the blue area, just leave one additional vertex.