Large Format enlargers. Constant monitoring of alignment. Chemical replenishing, the option of personal darkroom space so I could bring my own chemicals if need be (extra cost of course). Monitoring of people in the DR areas. I worked as a TA in 2 diferent community collge DRs and I can say say it was a PIA to keep people doing things right. Especially with the chemicals. common courtesy and neatness are a big plus.