To-Do list of existing issues in MTA SA 1.4

The following list contains all known issues that are in any way serious obstacles for my current development progress.
The order is sorted by priority, meaning that the worst issues are on top.
Please note, of course there are some other issues that can not be mentioned here (for example the low performance/draw distance of the MTA 1.5 streamer that will be fixed with MTA:Eir).

http://bugs.mtasa.com/view.php?id=8020
The famous most-wanted issue #8020 causes problems with custom vehicle dummies. This prevents me from finishing my custom main gun script for any vehicle.
The "most wanted issue 8020" has been fixed in revision 6974!

http://bugs.mtasa.com/view.php?id=8029
Per entity model replacing or something similar is needed to get more than 1 Rhino tank or other vehicles into the game (My objective is to add 4 different models for Rhino: Panzer IV, Panther, Sherman, M36 Jackson)
Worked around with a script (Now we have 6 tanks)

http://bugs.mtasa.com/view.php?id=8538
This function is needed for some mathematical calculations and to retrieve a hit-element for my  custom main gun script (realistic bullet penetration and so on).
Fixed in r6990.

http://bugs.mtasa.com/view.php?id=8526
Some custom vehicle`s wheels are sunk into the ground. Allowing to modify the wheelScale factor in vehicles.ide should fix this issue once and for all.

http://bugs.mtasa.com/view.php?id=8562
This issue causes the tank tracks to move forward even if the tank is driving backwards. I am working on a workaround that provides a better solution.
I found a workaround for this.

http://bugs.mtasa.com/view.php?id=8566
Custom effects have a very low draw distance in MTA 1.4. There is not more to say about this.
Issue 8566 has been fixed in MTA 1.4.0 revision 6892!

http://bugs.mtasa.com/view.php?id=5665
Idle sway of sniper scope or realistic recoil functions need the ability to modify the target position where the player is aiming at. Currently impossible.
Fixed in r7343.

http://bugs.mtasa.com/view.php?id=8550
Some vehicles are driving too fast backward. It is not possible to change this weird behaviour.
Found a workaround.

http://bugs.mtasa.com/view.php?id=4571
Custom animations are needed to load custom prone animations or the BMW R75 bike with sidecar and maybe even more into MTA.