Help modifying Gantt chart code in Redmine

I am seeking for some help in a project I am developing around Redmine. Right now, I would like to change the default start date of the Gantt chart from the actual date to the earliest issue date. I have done some progress but due to my limited knowledge on rubyonralis I do not know how to continue. I attach a post done in the redmine website which contains all the information I have. I would really appreciate any kind of help. Modify default start date in Gantt Chart - Redmine

Thanks AF

Antoni,

Welcome to the list.

Let me know if you would like further assistance as I’m familiar with redmine. – H