Not having any Wemos 8266's but a bunch of Amica NodeMCU's (V2), I used the original design as a basis but made changes so a standard NodeMCU ESP8266 could be used.
For the SH1306 OLED displays, the mounting holes are different so there are two mounts labeled RT for RED TAG, or GT for GREEN TAB.
STL's for the SH1106 are also included.
Two M2 x 4 hex head bolts hold the OLED displays. M3 x 5 are used for the NodeMCU and holding the mount to the case on the bottom. Don't use an M3 that is too long to hold the mount in the case, it can touch the 8266's pins and short them out.
Note: The Octomon_LoLin is a mount for the LoLin V3 and a 1306 OLED. The LoLin is a long board so it protrudes slightly from the rear of the case. There is a LoLin V3 case as well.