Update README.md

Author: raadcostellomahmoud

README.md

@@ -9,5 +9,8 @@ Both sections are present for NGC 4151. Please don't hesitate to direct any ques
 
 If the ipynb files decide not to load here in github (as they seem to do on all sorts of Jupyter Notebooks apparently at random, cheers GitHub), either try refreshing it a few (hundred) times, or try these links instead:
 
-NGC 4151:
+## NGC 4151:
 https://nbviewer.jupyter.org/github/RaadMahmoud/AGN_lightcurve_modelling/blob/master/lightcurve_extraction_and_modelling_NGC4151_GitHub.ipynb
+
+[2023 retrospective: 
+Oof, spaghetti code galore! Object orienting this is certainly on my list, but this is overwhelmed by work obligations at Kromek right now. Please be aware I am even more horrified than you by the quantity of repeated code in this tutorial, and instead take it for what it was: physics research code for a physics research audience (read: bodge-programmers!)]