'attribs' DB table column of 'flexicontent_fields' DB Table is not large enough to store large configurations

Sorry for my low knowledge about Flexi :dry:
I install on my site Flexi and now i have 1 alternative - learn it

I dont know - possible that i want in Flexi or not, whithout third-party components or plugins.

Now i make a menu item - Flexi Categories, with all categories of content, and give it alias "regions", then set Field Filter as custom field - my field regions.
Then i make a prefix for field "regions" <a href="/regions?filter_16={{field16##0##_value_}}">.
It works ok!

But there is a way to get more pretty links? Now it looks like /regions?filter_16=myregion,
but I want /regions/myregion
I write about cityes - there is 1700 cityes, and i missing some small sityes, so i want give a possibility add new city for user, who create content.

It possible with flexi+small PHP code (because my PHP very very weak) make that:
page "/regions" -> list of links to all regions
then page "regions/my_region" - -> list of all flexi items (news) with field "regions=my_region" + list of all city in my_ region (maybe as a module)
then page "regions/my_region/my_city" -> list of all flexi items (news) with field "city=my_city"

Then another question - it real or not - make subscribe for users for they choosen region (maybe with javascript Jquery cookies plugin or another)/
Some a little wider question - is it real make subscribe for custom field? Author, category, tag, custom fields - like my regions or city - that user (guest or registred) can subscribe for news with criteria as he want fully - by author, by category, by type... e.c.

If it real only in flexi - can you ask how it make or please ask moving direction,
if it real with some external JS code - please ask moving direction.

Hello

you can have "LOCKED" value for filters in category menu items


-- so to have links like:
regions/my_region/my_city

you need to create category menu items that will be in a tree structure (parent-child menu items in menu manager)

1. enable "Category Parameter override" in them !!
2. Enable locked filters parameter
3. Set the value of as following

regions/ should be a category(*) menu item without any filter
regions/my_city should be a category(*) (sub) menu item with locked filter city
regions/my_city/my_region should be a category(*) (sub) menu item with BOTH locked filter city and locked filter region

(*) it can also be multi-categories menu item